I've been playing a lot of the 3DS version of Super Street Fighter IV and I've noticed that most people stay with the same small set of fighters instead of having a more even distribution among the character picks. Lots of Ryus, lots of Akumas, plenty of Kens, some Sakuras, a few Juris and Ibukis, and the rare Cody, Abel, and Dudley. 8 out of 35 is pretty low, really, and I imagine that it has to do with a combination of difficult to perform moves, difficult to handle play styles, balancing issues, and the inertia of tradition.
So my question to the greater DP community is, "Which characters do you like but you don't normally play as or are good as?"
I know some might see this as a silly answer, but my answer is Dan Hibiki. I know he is a "joke character" and all, but his silly, over-the-top expressions and parody nature endear me to the character of Dan.