I'm unfortunately in the "unreliable" category. I'm a slow poster, so that's one problem. Plus, I tend to think way too hard, and put way too much into a CS, that's two. Plus, I constantly doubt my writing/RPing skill in the presence of others. But four is the most important: I can get mentally exhausted, very, very easily. Say you play a big board game, like, I dunno... Civilization the Board Game, or Argent: The Consortium, or Twilight Imperium. By the end of it, you can often feel physically and mentally exhausted, because you've sunk several hours into poring over strategies, actign and reactign with the ebb and flow of a needlessly huge and needlessly complicated system. Generally I can either play a big board game like that, squeeze out a few posts, or work on a few pages of the novel that hasn't been finished in years, but I can't do more than one in the same day.