I know what you mean my brutha! My wife isn't so bad with the nagging, it happens but not constantly. Mainly driving sets her off, she tends to critisize my driving then when I tell her to knock it off she denies doing it. She does things driving all the time I find questionable but I don't say anything because I don't care. Hey I'm still breathing, we didn't hit anything so why cause trouble? When she gets mad though she REALLY gets mad. She can be mad for days. Myself and I think most guys just don't have the energy to stay that mad. I mean, I'll get mad for maybe fifteen minutes and its over. I'm done and move on. Ask me later and I probably won't even remember it. If I'm REALLY mad over a large issue it might last a day. Once I've slept I'm over it. The wife however will hold on to a good mad FOREVER! I just don't care that much. It takes way too much energy and time. I usually just take it and aquiesce. I'm gonna do what I want anyway and fighting is only going to drag it out. I know I'm right and thats good enough for me!
Maybe guys life views are somewhat simpler. I've got food, I get laid, money in my pocket, beyond that I want as little grief as possible so I don't go looking for it.