Just curious. For me:
1) Nursery leader was wonderful! I would do it again in a heartbeat.
2) I'm not exactly shy (as everyone in the entire Bloggernacle knows), and I really like to organize and give talks (surprise, surprise) - so I really enjoyed being on the High Council. It helped to have sincere, humble Stake Presidents whom I admire greatly.
3) I had an incredibly humble, gentle, loving Bishop when I was a counselor - and the Bishopric included people with radically different political and religious views. I'd choose that calling without hesitation if I could choose the Bishop, and especially if I could recreate the diversity of the Bishopric.
4) Primary pianist - again, in a heartbeat. Listening to the kids sing . . . gives me chills again just remembering it.