I think I've had a few cuts, but I'm generally accident prone, so i didn't mind that part too much.
biggest annoyance is generally the CPU cooler, but even that's not a huge deal. The one time i dropped a brand new CPU on a carpet and bent like a quarter of the pins was pure nightmare though. I spent about an hour with a precision screwdriver bending them back in shape.
Generally, I like building PCs. Wish I had more money to do it more often.
Probably gonna build a new one in a few months for my old case, not expecting a ton of issues. since I'm planning to keep all the extra fans I've got running in there already.