Mine is my forehand. I just recently switched to a full western and man the topspin is crazy. If its not my forehand then it's my double backhand which I can always rely on.
I like to play against net players. I'm not good with volleying (although I am working on it) I do rip some pretty nasty forehands when they hit short balls. The look on their faces when it shoots past them is priceless. Plus i'm more of an agressive baseliner (i still need to work on my angles) I hit the ball with top spin straight back to them push them further and further behind the baseline and when the time is right i send in a forehand volley dropshot for the win. Since they are net players they get tripped up when they play me because they can't really do what they want. I'm talking about my two buddies by the way. They love to play net and they hate playing me haha. I haven't had a chance to play any other net players. The season is not here yet.
But me and my friends are rookie-intermediate. I know it won't be so easy if I play other people. But I hope to experience more of a variety of playing styles.