Hello people.

I'm not very good at Skyrim lore so wanted to ask you guys.

What are the life style of races in their own land?

A second question; -if there is any- which race favors to live in Castles and Fortresses over adventures?

Thank you.

This is really too broad a question to answer, even if we lump all the individuals of a race together (which we really shouldn't). The http://www.imperial-library.info/content/pocket-guide-empire-and-its-environs-first-edition or http://www.uesp.net/wiki/Lore:Races are good places to start for this sort of info.

As for your second question, I don't think there's any race that is dominated by adventurers over regular people. There are cultures that have a more favorable outlook on that sort of lifestyle (Nords and Redguards come to mind) and those that have a less favorable view (Altmer, mainly), but generally adventuring isn't restricted to one race and there's no race that doesn't have people who would rather the adventuring.

Yeah there's too many variables and not everyone is going to act like a walking stereotypes. You'll encounter different types of people from the same race in their home land and anywhere.