Least: Finding the time to get started, then being interrupted by other chores and then finding time to re-start.
Most: Photography. Before, after and during. I don't always capture every step, but it's fun to relive the restore and have a nice record of the result. I don't keep every kettle I restore, so it's one way to remember those who have passed through. Kettles are like HOBOs. Homeward bound travelers. Stopping long enough to share a meal or two and moving along, closer to home with new stories to tell.