[djshawk]

So then you limp preflop, somebody in LP raises, you call, miss the flop and have to c/f

or

You limp preflop, 2 people limp behind you, sb calls, bb checks. 5 to a flop of K93, you have to c/f.

If you raise though...

everybody folds - you take the blinds

1 caller, flop of K93 again, you cbet and he folds

But the most important one of all imo, you get 1 caller + bb, flop is K63, now all you want is to get as much money in the pot as is possible. In this case the pot is already 12-15bb so getting 100bb in should be pretty easy if somebody picked up a hand. In the limped case, the pot will be 4-5bb so it will take you a street of betting just to get the pot where it would have been had you raised preflop so getting max value from KQ, 45 etc will be so much harder.

Also, if you call small pairs preflop and raise big pairs preflop you'll be so easy to read. If you raise everything then you keep people guessing.