Obviously flight would be a winner, but I think I'd choose the standard indestructibility+super strength classic. I'd be the most useful to my group. I know it's a lame choice, but if the zombies can't bite me, and I can fight off unlimited amounts of them, and barricade entrances by lifting a Suburban in the way...then we'd pretty much be guaranteed survival.
If I were to make it a bit more tense I'd go for Adoptive Muscle Memory (the kind where I never forget something I've learned). I'd still be invincible. I'd know so many fighting techniques with so many different weapons, ranging from stuff that is actually a weapon to the zany stuff Jason Bourne uses as weapons (books, towels, candle-holders), not to mention the kicker; world greatest freerunner.
If I were to make it a bit more tense I'd go for Adoptive Muscle Memory (the kind where I never forget something I've learned). I'd still be invincible. I'd know so many fighting techniques with so many different weapons, ranging from stuff that is actually a weapon to the zany stuff Jason Bourne uses as weapons (books, towels, candle-holders), not to mention the kicker; world greatest freerunner.