Originally Posted by Fnord

ATo

Never call a raise, only open raise. 3-bet a very loose raiser from MP and on.

EP: Muck
MP & LP: Open raise, limp behind multiple limpers, raise behind a loose limper (preferably who raises a lot too) and muck behind tight players that don't raise a lot.
BB: Call a loose raise, 3-bet a steal, fold to a tight raise

ATs

Same as ATo except:

Open-raise any position
You can cold call behind other cold calls.
Raise behind mulitple limpers (suitedness gives you great equity in a multi-pot)
Be more inclined to call a raise with it from the BB