Let's get this party started. We may actually help some guy or gal with this list of dreadful jobs.
Add your submission for any BMW service, replacement or repair chore that's presented in a shop manual or by a now-former friend as an overly simplified job. Add any chore that eventually turns you into a raving, wrench throwing maniac. Personal screw ups don't count 'cause you can't fix stupid. We'll toss the BS flag on any of those.
Swing Arm Boot replacement. Next time, just smear some Goop and ride on.
Bing CV Carburetor synchronization. Read about it all you want. Death by a thousand cuts.
Changing tires. Sounds s-o-o-o simple. Wasted days and wasted nights...