My pet peeves besides the usual public idiot or property manager without a clue .(usually a women I hate to say) ANYHOW... is being finally called out to fix something three other people have worked on and screwed up way beyond the original problem. I call it fighting your way back to the original problem.
The other is dealing with mod crews that mark all wiring cables as BR JR SR.... Bill remembers, John remembers, Sam remembers. lol
I mean for God's sake.. you go to the car top or MR with strippers, wiring screwdrivers, electrical tape... can you remember wiring tags or at least white tape to write on ?
I don't know how many times I have seen guys cross two identical travel cables because they " thought" they remembered which one was which.