When and if I debate it's always over topics in which I have a definite point of view, and I debate in support of that point of view. When people oppose me in a debate, I naturally assume that they're doing the same. It's a foolish assumption, I've discovered, but I repeatedly do it because it's my default state. I want to talk about things I care about; I want to work with ideas I really believe in. I want to come as close as I can to the truth.
Using debate skills to play a mind game is, to me, as exciting as watching paint dry. If I ever post a message to anyone quoting Captain Picard saying "Romulans...it's always a chess game with them," you'll know they've struck this nerve.
I've learned, too, that debate on the internet is frequently not debate, but rather a process of striking a succession of poses for millions of up-late-at-night readers to admire. I don't much care for that either.