There is no easy solution to add punch to all the kits; the only way to do that would be to adjust some eq on your mixer or whatever you're using to output the sound to your speakers.
Otherwise, you can use your fx for an eq and adjust part ten accordingly, keeping in mind that whatever other tracks you use the fx for will have that same eq.
3rd you can make a couple user drumkits with some of your most used samples and do some creative filtering. I have done this to quite good effect, but then you are limited to your user kits, because all the other kits will remain normal.