I face similar problems as Diana about the deadlines... And there's also another complication. My mind's full of ideas for stories, plotlines and twists, but then I sit down and can't get past few chapters. Sometimes, I have a clear idea only for key scenes and can't come up with the way to connect them well. Those scenes are often kinda exciting, so writing things in between is boring to me in comparison. Sure, maybe they wouldn't be boring to the reader, as they don't have access to all information, but I can't get rid of the feeling it's just not good. And when I think something is bad, I angst about it and try to correct everything... However, after that, the original idea gets shrouded. So yeah, a dead end. Writing alone makes me kinda nervous, as I see it as a "serious business," with roleplaying, though, that's a different story. It's simply fun which I enjoy immensely.
Maybe I'll call myself a writer in a future when I overcome this little irrational shyness.