AJo UTG - fold, call or raise

[Luke]

Assume a typical, 10-handed, loose-passive 3-6 game with very little pre-flop raising. Many opponents will play nearly any ace. You are dealt AJo UTG - how do you play it: fold, call, or raise? From reading HFAP I guess S&M would GENERALLY advise calling with this Group 4 hand. But considering the specific game what is the best play? Raise in an attempt to limit the field? Call to keep the A-junks in? If you call, and are raised (not often in this game), how would you then proceed if you didn't have a read on the specific player (the raiser). What if you were dealt ATo UTG in this same game - do things change all that much? Any advice, point of views, etc. would be greatly appreciated.