I play mostly cash. I'm a decent cash player, but i know i'm a weak mtt or sng player. My strategy depends on the limits i'm playing.
At the low level microstakes I'm playing straightforward tight aggressive. No fancy moves or bluffing. These players don't think about anything other than their own cards.

At .25/.50 NLH and higher I will start to use image and bluffing strategies more often. These players tend to pay more attention to what's going on. I still play aggressive though, that's the key to success at any level.