I'm a slow poster and don't always have time to engage in lengthy discussions but I like debates. I have absolutely no interest in sugary, non-confrontational "d&d is awesome" threads.
I'm not a fan of long, wordy rants (I simply skip walls of text) but I'll take a good critique, controversy or all out edition war over a series of gushing "wow this is so cool" comments.
Even if you don't end up convincing anyone, confronting different opinions and arguments is interesting and venting is healthy.
That said, I do find personal attacks and thread-jacking unacceptable