Well, my current pet peeeve is speaker binding posts that are too close together. My speakers take banana plugs. The bananas on my speaker cable are WBT angled bananas. The angled banana is wonderful for stress relief and for cables that are a bit stiff. However, if the speaker posts are too close together, the angled bananas bump into each other and are difficult to insert. It's exacerbated by the fact that the speaker is bi-wired, so there are four of them crowding into the back of the speaker in the same small area.
I expect that people who use spades have all sorts of peeves about binding posts too.
I expect that people who use spades have all sorts of peeves about binding posts too.