Which race just doesn't do it for you?
For myself, I've always felt like there was a lot of potential lost with the Altmer and the Bretons.
The high elves' yellow skin just reminds me of the Simpsons/malaria; I really feel as though the way the skin-tone was done in Morrowind and Oblivion was just... not good =/ As for Bretons, these fellows are supposed to be essentiall a mixed race of elves and men (leaning physically towards human) but they look indistinguishable from the other human races in-game, any game.