D2 or D4 are the best locations...
i try to stay away from anything on the northside... looks pretty dark and dodgy especially at night. i'm sure it's mostly harmless (compared to most of my hometown) but then again one just tries to avoid unecessary risks by staying away from the northside, which i dont know much beyond o'connell street. and yeah hotels are a location i avoid seeing as i've worked in a few of the big ones.