I think Franklin will be the most interesting to check out first. He seems to have some CJ in him and being back in San Andreas really adds to that familiarity. Ultimately they will each offer such different experiences that it will make the overall interaction great.
Trevor kind of sounds like James Woods XD, i'm gonna go with Franklin, since he reminds me of CJ from San Andreas and he's pretty funny. although, most black people are, especially when they get angry like this guy> http://www.youtube.com/watch?v=oXsTexVtnMQ LMAO!!!