So much Argonian hate in this topic. I'm a sad, sad lizard.
Yeah, I'm surprised! I thought argonians were among the more popular races, especially in the rule 34 department. But I can see that they're too far removed from the other races to many people, being hist-born and all.
As for my least favourite race, the obvious choice would be altmer, although I've begun a thalmor char and he's grown on me. My second pick is Breton. I don't care wether it's their fault, they make The Reach such a cluster[censored]. And there's something about High Rock society that rubs me the wrong way. Also, are they elves or humans?! Such a travesty!
I can see that the imperials are the newcomers in the series, but I only played Oblivion before, and I like the idea of a cosmopolitan, highly insitutionalised culture inspired by the roman empire, and not elf[censored] mcdouchenoggins.
edit: I'd also add that I'm not too hot on the concept of magical wood elves that are pure and in harmony with nature and fart unicorns, although their pact of cannibalism earns them a couple of points in my book. They were contenders for least favorite race in Oblivion (or at least the males), but they've stopped offending my senses in Skyrim for the most part.