Plenty of reasons, Bickaxe, some trivial, some not, all contributing the whole state of ennui that I feel. However, two current reasons come to mind: I have writer's block, and the announcement of the TP Prize shortlisting is soon, and I don't think I'm going to be on it.
Quite frankly, if I posted on this thread every time I was depressed, Tony would have to make a new thread far more often. I only posted now partly because of the TP forum nature of the depression, and partly because I had the brainwave of using an image of, and quoting, Marvin. So even when depressed, I do have a perverse sense of humour. Some of the time, anyway.
"What have you been doing since you stole that antique TARDIS of yours, since you first landed on Skaro? Shouting 'Look at me!!! I'm not fighting a war!', while you battle the Daleks all the way through space and time."