But in morrowind, on solsteim it's easy for my nord... Against enemies that uses frost attacks...
I don't think it would be overpowered...
You admit that it was easy but you don't think it's overpowered? Too easy if you ask me, and thus overpowered.
Why is that? Personnally I love Wood Elf (exept for the fact that every other character is taller) because I go stealth way usually. But what is that awesome about Nords (except the obvious cold resistance) ?
It's a popular thing to pick the race that is native the land that the new TES game currently takes place in. It has little to do with Nords themselves. I've never played a Nord before, but will be playing one for my first character in Skyrim. A lot of people feel that, for example, a non-Dunmer Nerevarine doesn't fit quite as well. Same goes for a non-Nord Dragonborn.
Several polls have shown Nords to be the most popular choice here on the forums for a Skyrim main character.