Day 2 - Favorite Playable Race
My favorite race ties into my favorite world setting. The Kalashtar from Eberron are a race that I find interesting and fun to play. Their odd connection to the realm of Dreams is something I found slightly confusing at first, but extremely interesting regardless.
And as far as playing them goes, their ability to embed special gems in their bodies to give various bonuses and effects made for some interesting combinations when coupled with the right class.
All in all Kalashtar are my favorite, with Humans of course being in close second (followed by half-orcs).