In a micro games with a lot of limpers i.e. $0.10-0.25 blinds I will see about 30-35% flops. Once the flop comes even a $0.25 raise will fold just about everybody. Always made me wonder why are you going into the hand if you don't want to bet anything post flop.

In higher stake games i.e. $0.50-$1 and up your flop seeing % should be around 20%