I've been using foobar2000 since the 90s. It plays music effortlessly, but I also love the extensive tagging and ripping functionality. Another plus is its interface skinning flexibility. There are recently made "modern" looking themes if that's your thing. I'm currently using Georgia[0].
Haha, thanks. Just more evidence that I'm getting old. It feels like I've been using it since I first touched a computer. But most likely I found my way from Winamp like most folks.
[0]https://github.com/kbuffington/Georgia