Totally depends on deadlines - if I believe I have to get something done I will get it done. That said, I had one hand-quilted queen size quilt take me 9 months, and another take me four years! I kept track of hours on only one hand-quilted quilt and it was over 300...which is why I machine-quilt now. I love the process of doing it by hand, but I just don't have the time!
If I am having fun while doing it, and not getting stressed out, then I am happy for it to take however long it takes.
Alison