Fizz, Fiora, or Ahri

They all have good versatility, and great ults, alot of it just depends on what your strong with and how you play. Atleast until you get to lvl 30 then its all about knowing each and every champ, what they can do and what you need to pick n do to stop them. I own all 3 of those, plus 80 others and I like them all.. No 1 champ is "better" each has a role and play style, it comes down to what you like that decides your favorite.

:P fizz ;)