I'll only play ace rags in late position early in the tournament and I'll fold to any big re-raise post flop even if there's an ace on the board (exception if I hit 2p obviously).
the problem with that is you wake up with a big pocket pair ( or any really strong hand ) and the bb has a huge stack and calls you with rags and beats you
From UTG even AQ is a -EV hand for most players in cash games, it's just too hard to overcome the positional disadvantage. If your plan is to get cards make a hand and win at showdown you're generally not going to be profitable. Most value comes from winning hands without showdown.
definitely depends on your positioning, If you are towards the first of line, I usually lay them down, but if no one has raised and I'm close to the button or in blind I'll call/raise