I've played half-elves, dwarves, an elf once, but my favorite playable race is human.
I find humans fare more interesting to play than any other race.
You can read about it in post from last December:
I still have that philosophy (though I hope I'm writing my blog posts better now). I just like to see what humans can do, especially since they don't have all of the advantages other races often have.
Maybe its the writer in me.