I think hand milling is relaxing. My only complaint with my corona mill is the hopper size. I know I could easily fix it, but as the old saying goes, "if it's not broke, I'm to lazy to fix it."
An easy way to hook up a drill to a corona mill is get a bolt that fits the hole where the hand crank bolts on. Cut the bolt head off, screw what's left of the bolt in, and tighten the drill chuck on the bolt. You're good to go. If the chuck spins on the bolt, file the shank of the bolt into a square for it to grab onto.