No race "should" anything, the might have a tendency to a specific type, but not every person of that race should be like that.
Oblivion had a majority of orc warriors, but there should be exceptions, or it would break completely with customization freedom, it would make little sense to have the freedom to make an orc mage at all, when they can't and shouldn't be mages.
Every race should have a heritage sure, but to always have dunmer racists, to always have wood elfs be rangers or any other such nonsense would leave the world devoid of creativity.
Exactly. Every race should be stereotypical. Orcs should be brutish, Altmer should have a superiority complex, Khajiit should speak broken english, Dunmer should be highly racist, etc. Sure, there could be exceptions, and quite a few exceptions in the homeland, but the majority of a race should be stereotypical. It adds culture, and gives NPC's character, and makes the races more unique.
What Daydark is saying, I think, is that there can be the stereotypes about the races, but they shouldn't be true 100%. Hircine, if I get what you're saying, you say that there should be stereotypes about the races but they shouldn't always be true. It sounds to me like you guys are saying the same thing, just maybe Hircine, you think the stereotype should be true like 90% or so, and Daydark, you think it should be true like 60% or something like that. Is that what you guys are getting at?