The most important part of Winamp is the global keyboard shortcuts you can set up. I have been using wasd controls for my games and my player since forever. Well, since I found the global keyboard shortcuts in winamp...
wasd for games, ctrl+shift+qewasd for play/pause/forward/backward/next/prev and so on. Don't need to switch window, don't need to move hand away from wasd. Can't live without it now even though I don't have so much playtime any more. Works just as well in any other environment.
I am often disappointed by the lack of shortcuts and features in VLC compared to Potplayer.
Just some of the few keyboard shortcuts in Potplayer I use regularly:
"<" and ">" to shift the subtitle sync by half a secondd
"shift-<" and "shift->" to adjust the audio sync by half a second
"[" and "]" to set an A-B repeat of that awesome scene or soundtrack
"D" and "F" to move by a single frame forward and backward
there's also shortcut to decrease and increase things like saturation and brightness by 1% or shortcuts for 0.5x, 1x, 2x size.
I have to make do with SMplayer in Linux which is awesome but you have to setup the keyboard shortcuts manually yourself.