Pro tip for an Ableton Live user for natural hi hats :

On the hi hats samples you want, use the LFO that is built in in the Drum Rack's sampler. Be sure to activate it and desactivate the "retrigger" option. Now select a rate.
You can modulate the pitch, the pan, the volume of your drums by raising the % of the "LFO" fader next to each of these parameters in the sampler.

With weird rates (5/16 and so on), and by using different rates for the different hi hats samples, with a different "wet/dry" amount for all the parameters, you can end up with something really groovy