I enjoy most parts of the quilting process, but I would put the actual quilting at the bottom of the list. I find it hard to do and I'm never really happy with the results when I do it.
KalamaQuilts & Three Dog Night - I had to laugh (uncomfortably) when you talked about donating your unfinished projects. I have also done this, but our quilt guild actually had to ask people to stop for a while as they had hundreds (no, I'm not exaggerating!) of quilt tops waiting to be finished and they'd run out of storage space for them! A concerted effort by the community quilts team to layer and baste those UFOs along with some fantastic guild members who then took the sandwiches to quilt helped to reduce the backlog, but it took months and months and it certainly made me more aware of the drawbacks to that system. I still can't really do much with a big quilt, but I've committed to doing everything I reasonably can to finish the quilts I donate. If that means that most of my donations are more crib/lap-sized, so be it. :-)