Mine is Strawberry since it has a ton of options and plays a ton of formats. It's also (distant) fork of Amarok 1.4 and integrates well with KDE Plasma. I'm curious what other people are using these days. What's your favorite player?
Mpd has always served me well. I use ncccmmmmppp (however its spelled) to manage playlists and such. For album artwork I run sxiv pointed at file in /tmp/. I forget how that part works, actually. I have a grid layout on a second monitor, so I just square up the mpd client and sxiv. Doesn't look too bad.
Semi-related, but as a project I ripped out the pressure/impact pads of an old midi keyboard for use as prev/(pause/unpause)/next buttons, so if the song sucks I can literally punch my desk to skip it.