Gnomes and half-orcs for me.
I started with 2E, and half-orcs weren't in the PHB then, so I'm quite used to the idea of a D&D without them, save maybe as the occasional NPC. As for gnomes, they've never really seemed to have an archetypal feeling to them (save for Dragonlance's tinker gnomes), and while I like them being there, I don't think it'd be that much of a loss if they were removed.