- a while ago pa got audio routing wrong on a new/obscure laptop, wrong audio routing as in - speakers would not turn off if you plug in headphones. That eventually got fixed with dnf upgrade and no effort on my part;
- on ultrabook, pa sucks noticeable amount of battery by waking up 100 times a second (while no audio is being played). Something akin to what this poor chap is describing:
https://www.reddit.com/r/Fedora/comments/6d7776/pulseaudio_b...
The only bug that's affected me in the last couple of years was that the default volume on USB headsets was always set way too low. Pavucontrol helped sort it out
Something to do with opening the card in different profiles I think.