Worst/Best Mechanic and Evergreen Mechanic

[Agrus Kos, Enforcer of Truth]

Okay so I want to know, from each person, the worst three and best three non-evergreen mechanics ever (and why). Also what are the worst three and best three evergreen mechanics (and why). I will record and keep track in this post what the top answers are.

For all those who are wondering, here is a list of evergreen mechanics: Deathtouch, Defender, Double strike, Enchant, Equip, Fight, First strike, Flash, Flying, Haste, Hexproof, Indestructible, Intimidate, Landwalk, Lifelink, Protection, Reach, Regeneration, Trample, and Vigilance.

[Mattao19]

3 best:
Hexproof bc in Gm. 1 half their hand sucks lol
1st Strike bc FS cards usually have good CMC and it changes the way combat works
Vigilance bc it's underrated and fun

3 worst:
Defender bc it's just nice to have the option
Dbl. strike bc often the cmc of DS is stupid
Landwalk bc it's very hit/miss

[Agrus Kos, Enforcer of Truth]

Here is my opinion:
Best Evergreen Mechanics: Hexproof (I don't like having my creatures blown up), Flash (Instant speed creatures are awesome for blocking, getting around sac spells, ect.), Vigilance (attack without leaving yourself vulnerable)
Worst Evergreen Mechanics: Landwalk (too conditional, rather have unblockable), Reach (strictly worse than flying, although I realize its necessary for green), Intimidate (same as Landwalk)

Best Non-Evergreen Mechanics: Ninjitsu (I think it is really cool and flavorful, I like shenanigans), Persist ({Kitchen Finks}, need I say more?), Morbid (usually applies and is many times great, {Tragic Slip})
Worst Non-Evergreen Mechanic: Shadow (its unblockable, call it unblockable (I know they didn't have unblockable in Tempest block, but you know what I mean) also conditional), Banding (so stupid and confusing), Landhome (too conditional, even with all the weird abilities out there)

[Dudecore]

Best Mechanic is probably Flashback - it's very intuitive and adds that looming specter to every battle.

Worst mechanic since Bands with other has been taken is probably either Sweep or Epic. Epic has won games, but the effect has to be so awesome that it would be worth losing for. Sweep is just bad.

Best evergreen keyword is flying. Same reasons as Flashback, it's super intuitive. Creatures with flying can be blocked by creatures with flying or reach. Boom. Understood.

Worst evergreen keyword is regenerate. So much rules baggage. I've been playing 16 years and still don't entirely understand it.

[FlickerYourOwnIdentity]

My friends didn't understand regenerate, and when I tried explaining it, I came and looked on the app with him for 4 hours.

Regenerate still confuses me ._.

[Dudecore]

Something about paying for it before damage is dealt, then turning it sideways and removing the damage...but board sweepers don't apply damage so they can't regenerate? I'm so confused...gimme Flash, First Strike, hell even Protection (DEBT is easy enough to remember)

Grats on 100

[FlickerYourOwnIdentity]

I guess it is just the way it is worded for me, and how many rules apply to it.  Wordy explanations hurt my brain.

And thank you dudecore

[Kaworu, the Fifth Child]

Hexproof, double strike, and indestructible are awesome.

Otherwise:
Cipher, in everything I've seen, is the most broken thing ever. Miracle and Undying are nice. Phyrexian mana, if counted, is OP. Iverload is great at triggering things, devotion is powerful but no fun... Blah!

[Mattao19]

Hexproof, double strike, and indestructible are awesome.

Otherwise:
Cipher, in everything I've seen, is the most broken thing ever. Miracle and Undying are nice. Phyrexian mana, if counted, is OP. Iverload is great at triggering things, devotion is powerful but no fun... Blah!

Cipher? Broken? Sarcasm? If not explain lol

[Ertai]

Worst mechanic since Bands

Oh man. Still the worst.

Oddest of them all would have to be Flanking. It's decent if you know how to use it.

Best Evergreen would be Deathtouch. Simply because a skill that let's a 1/1 kill a 1000000000/10000000000. That's pretty decent. They didn't make it too op where they could have by killing the player when touched. IE: {Phage, the Untouchable}, Vraska.

[Birdbrain]

Best Mechanic is probably Flashback - it's very intuitive and adds that looming specter to every battle.

Worst mechanic since Bands with other has been taken is probably either Sweep or Epic. Epic has won games, but the effect has to be so awesome that it would be worth losing for. Sweep is just bad.

id say epic is worse, because sweep is synergistic with landfall

Hexproof, double strike, and indestructible are awesome.

Otherwise:
Cipher, in everything I've seen, is the most broken thing ever. Miracle and Undying are nice. Phyrexian mana, if counted, is OP. Iverload is great at triggering things, devotion is powerful but no fun... Blah!

Cipher? Broken? Sarcasm? If not explain lol

it's realy underpowered and needs the right support if you ask me. I've only found one cipher card useful (there may be others, I don't play black at the moment) and it still has some bugs to it. For example, the best creatures to put it on are weak...

Also, it puts a huge target on one of your creatures

[Mizark]

How about Shadow ?? Sure not the best mechanic but from a flavor stand point it's pretty flavorful, meaning that the spirits can't be blocked by the living but by other spirits since they both share the same realm (realm of the dead)

{Nether Traitor}
{Stronghold Overseer} come to mind

[Dmreiss]

Phasing?  You mean I only get this creature every other turn?  What?

[Steerpike]

Hmmmmmm
Well "best" has a lot to do with context. Haste is great if you intend to play aggro and not as essential if you don't. But if I were to list my favorites and least favorites:
Favorites:
Protection: There's just so much security in protection against certain qualities. In most cases, "Block what you want! Be unblockable! Yay!" There's a lot of confidence in protected cards.
Doublestrike: Again, security in what you're able to do is great. That meaning you deal extra damage--touching on deal-damage triggers, hits blockers before they can, makes this a great thing to have.
Lifelink: Every attack on a player makes double differences in the life total gap. That's huge!

Least favorite:
Defender: It's not that it's attempt at helping is poor, it's that it is inherently a nerf in and of itself. This one is arguably objectively the worst.
Landwalk/Intimidate: It's ok as long as your situation conforms, which it doesn't have to do. Situations could very well nullify this ability altogether.
Firststrike: Because doublestrike

[Moneekahh]

Best: flash, hexproof, flying

Worst: intimidate, reach, fight

I don't dislike any of the evergreen mechanics and picking three worst was actually tough for me. I picked flash, flying, and hexproof as the best because I love anything that automatically has a strong advantage. For the worst, like I said, still good mechanics, but not as strong in my opinion.

Non evergreen: I'd have to say that persist is the best and banding is probably the worst. I didn't read the other comments yet but I'm sure these have been covered.