Like above, I rarely ever limp 99. But for 22-88, I will usually limp behind but I rarely open limp. Most times I either open raise pre-flop or fold depending on the table.

Say your in MP2 with 44 and it's folded to you and you raise 4BB. Eh, you get one caller behind you but he's a loose-passive type. A c-bet almost always works here, even OOP, unless he's hit TP.

And the part about calling raises with good implied odds in the previous post is golden and +EV over the long haul. Learn. Implement. Enjoy.