Oooh! Good question! I have to be in the mood to actually do the quilting part, but when it comes to sewing together tops, I am almost always up for that.
Every once in a while I get tired of making quilts and get a new obsession for a while, but I always go back to the quilting. (I've been doing it off and on since I was 15, and I'm 33 now, so that's more than half my life!) It's my creative outlet and if I'm not doing it I'm not happy.
I have always got a LOT of tops sitting around waiting to be quilted! Right now I have 5, and am working on another one. I keep thinking I will get rich and send them all out to a longarm quilter! So far, that hasn't happened, but I have hope!