Aggression in Limit vs No Limit

[PokrLikeItsProse]

Playing limit hold em properly requires aggression, wringing value out of your weak hands. Playing no limit has been described to me at times as requiring more of a semi-aggressive or passive-aggressive style in order to play correctly.

I think that I am sometimes too aggressive when moving over from limit to no-limit. For example, when I flop trips in limit, I habitually bet and raise on the flop. When I have the same hand in no-limit, I think that I am probably too aggressive at times.

Any thoughts on the differences in the necessary aggression when playing limit vs. no limit?