i've been using fb2k for more than a decade now, but i gave up trying to do anything to fancy with it because its addon support was such a clusterfsck, mostly because i found over time that a lot of addons became defunct as their developer vanished, or the links broke or etc, and trying to get support on hydrogen audio was like sticking your hands into a bees nest.

to be fair it's been a long time since i looked into skinning it and things may be better now. it's still an excellent clean audio player, i just keep it close to stock with a few addons so i send audio to a chromecast.

there sure were some wild and beautiful fb2k skins and themes back in the day.