I mostly play NL Holdem - this is the first kind of poker, which I have mastered. Also, from time to time I like to play 5 card draw, but only for play money, it is interesting and fun.
I like the idea for this thread a lot! I'll give one.
7 Card Stud: Play the early streets aggressively. Go after the antes and bring-in by completing instead of just calling. Bet 4th and 5th street a lot. Don't get involved too loose or with lots of good upcards left to act, but when you do play a pot, go for it!