I play NL50 and from EP & MP I usually open limp 22-88, KQs, QJs. I'll fold the last two to a raise, and the low PPs if the raiser is a shortstack. I usually stop open-limping in MP3 and open-raise anything I want to play (22+,T9s+,ATs+,AQo+) but it depends a little on who's behind me. From CO & BTN my open-raising range widens a little.