Hi,
Avoid areas that have a large number of flags. Seriously. They may look festive and pretty and fluttery when you first arrive, and are blissfully unaware of their implications, but when people hang a great many flags they are basically stating 'this is our territory'.
I'm sure there are many people who are fine folk who live in these areas. But all the same, with what I know after being here after a few years it wouldn't surprise me if, as an outsider, you weren't welcomed with open arms.
Also, if you buy, get an electrician to check the house out, and get a home buyers report. Damp can be a problem, and sellers aren't obligated to report problems with a houses wiring.
Message me if you need any more advice - I'd be happy to help.