Daryl doing something rash now--as some reaction to the "normalcy" of the ASZ would be too out of character.
Not really. I think one thing that's been established about Daryl is that he still carries his contempt from before the apocalypse to the present. He showed a lot of resentment for the rich people at the golf club, and scoffed at that painting because it would be owned by rich people. Then all of sudden his group comes into this neighborhood that was basically built for rich people, and is likely still populated by some of them. Regardless of how his character has changed, he will never be able to adjust to that.
I don't think that means he's gonna snap and go insane though. He might just leave or hang outside the walls in one of those dilapidated houses. Or maybe he'll be sent into exile after beating the crap out of Aidan. Something has to give though.
Not only that, but remembering back to season one, he carries some of Walter White's blue meth with him, which also leads me to believe he had frequent run in with John Q. Law, which, with Rick being Constable, is now back in full cop mode. That probably won't sit too well with Daryl.