I do prefer to play as a human, nonhumans "don't sit right" with me either.
BUT it usually depends on the day. Like in Brawl my "best character" changes between Snake, Pikachu, Meta Knight, and Pit. If none of these characters are working for me that day, then I'll try Link, Toon Link, Peach, Marth, and Ike. If none of THOSE characters work for me, I just hit the random button XD.
So yea...lol