Here's one I think others may empathize with: Fish. Don't get me wrong, I love catching, cooking, and eating fish, but I specifically dislike the process of filleting/deboning fish. I find it very time consuming.
To add insult to injury, you would think smaller fish would be quicker to deal with than larger fish, but the opposite is true! Smaller fish have smaller bones and have less meat on them, so the process of removing skin/bones while saving as much meat as possible requires more fine motor skills and a careful eye!