Hm...as far as the books I read, I tend to lean on the morally upright and heroic ones at times or those who dream of a better life or do something for the good of their world, but have to deal with struggles and pain of being a human. They may have the tendency to not believe in themselves or lack self-confidence at the beginning of the story because they may be young and the society disagrees with them.
TV characters I relate to: Generator Rex: Rex Salazar, Noah Nixon, Beverly Holiday, Cricket.
Naruto: Hinata Hyuuga, Rock Lee
My Little Pony: FiM: Fluttershy
Avatar: TLAB: Katara, Zuko
One Piece: Tony Tony Chopper (my fav character was Roronoa Zoro)
Thundercats 2011: A lot of Lion-o and a little bit of Tygra
My favorite Superheroes I identify with: Spiderman and Batman.
Transformers...it usually depends on the series: Prowl and OP
FFVII Advent Children: Cloud Strife and Aerith (forget her last name)
Zac definitely from Crisis Core
Loved Vincent Valentine