its not just about hats. its everything. it all depends on the drums you use, the way you chop the samples, everything. you've got to have it already in your head how you want it to sound. there's no set formula. generally you can swing the kick and snare and then push the hats forward a few milliseconds, but again, this is all done to taste. that's the diff in rhythms like 9th's Khrysis and Primo. they all have different ears. and its not just drums. sometimes you've got to shift up the samples as well, and that again, is all in how you chop them too.