I have a slight problem that I've got too many ideas floating around my head (I think there's too many voices up there screaming for my attention). Sometimes it's hard to choose which story to focus on. Seriously, I've got 3 started, all which have been plotted out, ranging from paranormal to super hero to horror.
I do find it difficult at times to choose which story to work on. I know I should finish one before I start another, but I just can't do that. Instead, I find it a nice relief to have something to keep doing. It allows me to rest a project if I stumble upon writers block or my character's being too stubborn or say they get themselves locked in a padded room because they are seen as too crazy (yes, that has happened).
I do have targets of when I want my stories finished, and when I return to a rested project I have more momentum to push myself along, so I don't see it as a bad thing.
What about you? Do you just work on 1 project or do you like to have multiple ideas on the backburner?