Best: The West Coast Avengers, ironically (since it doesn't contain any of the "big 3" staples)
Wasp
Hank Pym (without costumes and codenames that changed every two minutes, relying instead on his scientific genius and microscopic tech)
Vision
Scarlet Witch (this was the era when she turned evil over her lost kids the FIRST time and MOVED PAST IT, which apparently didn't matter to Bendis
)
Original Human Torch (Marvel needs more Golden Agers as cool as the original Torch flittering about)
Wonder Man
Hawkeye (grew from the ex-crook trying to turn his life around into the hero who could lead the Thunderbolts to greatness during this time)
Tigra
US Agent (annoying, yes, but at least he had a good foil in Hawkeye here)
War Machine (I have and always will love Rhodey; hell, I even read two whole issues of Sentinel Squad ONE for him)
Worst: Yep, New Avengers for me.
Captain America
Iron Man
Spider-Woman I
Spider-Man (or Iron Man Jr., depending on his mood)
Wolverine
Sentry
Ronin
Luke Cage
Post-Civil War:
Captain America (firmly in command of his team again)
Hawkeye (Cap's trusted second-in-command)
Wonder Man
War Machine (just have him defect from ONE in the wake of the Civil War madness and give that ugly new Sentinel armor a paintjob)
Ms. Marvel (I don't even like her as a character, but she does work really well on the Avengers)
Black Knight (you knew I'd have him here, but the team really does need some means of combatting magic, and the fact that Cap trusts Dane a lot would make him ideal after being betrayed by Tony in Civil War)
Falcon
Luke Cage
Black Widow (much cooler spy Avenger than Spider-Woman, in my opinion; although the common arachnid theme between them is an odd coincidence, now that I think about it...)
Hercules (good foil for Dane and the Avengers will need a powerhouse)
I didn't put Thor or She-Hulk or the Vision on, even though they're some of my favorite Avengers, because I want the first two doing their own thing in their solo comics for the time being (assuming Thor gets another solo comic after Civil War) and the "new" Vision in Young Avengers has actually grown on me enough that I don't miss the old Vision as much anymore. I'm happy with him where he is.