My win/loss stats in the SB are worse than any other position, including UTG. So my theory for playing a hand in the SB is that I dump the hand unless it's worth playing for a full bet from early position. A lot of people get fooled into thinking, "I've already paid half price for it, so I only have to pay half price to play." True, but bad.
Your specific hands: low pp--if there are already 3 or more limpers; the others--never.