I've tried not to let stereotypes influence how I feel about in-game races, such as everyone hating on the Altmer because of the Thalmor. But in all honesty, aside from those in the Companions and a few random villagers, I've yet to meet a Nord that wouldn't hesitate to sound a resounding "Skyrim belongs to the Nords!!" when provoked, so I have to say I've developed quite a dislike for them. It got especially bad the first time I visited Windhelm and learned about the "Grey District".
I tend to favor the elf races (even the Altmer), and currently play an Altmer and a Bosmer. Though, I must admit, the way the other NPC Bosmer look is quite disturbing. I've yet to meet one other than myself that doesn't look like they've had their eyeballs jabbed out. I really played with the facial features of my Bosmer to get her to where I liked the way she looked, and I almost feel that if it weren't for the ears you wouldn't be able to tell she was an elf at all. I can't say I'm a huge fan of the Khajiit or Argonians either, but I almost feel sorry for them so I tend to get along well with them in-game, try not to kill them unless necessary.