What next?

I have almost finished the other something for someone but now have to decide what I want to start on next. I have so many projects either started or planned in my mind I don't think I will ever be able to finish them all. Especially as the list keeps growing way faster than I can knit and even faster than I could ever afford to buy yarn. Perhaps some socks next or maybe the black beanie I probably should be working on. Why is it that when you should be working on something it is no longer fun???