foobar2000
foobar2000 is my favorite music player. I like it, because it is really flexible and allows me to do many not-standard things :) And it doesn't force me to use skins.
Nice music in nice player ;)
BTW, I really like tagging music files. "By hand", without using any plugins that automatically fetch this information from the Internet. And not because there are no such plugins - there are, many. But I have a mania.. I want to have all tags exactly the same as the artist wrote them. So I always check CD cover, artist's website, etc, etc, to make sure that everything is spelled correctly. Correct wording, correct punctuation, etc, etc. Yes, I am not normal ;)
If you watch my foobar screenshots (or if you know me well), you will notice that I like listening to Japanese music. On the other hand, I am still not good at reading Japanese.. So I decided to tag Japanese music using both original spelling and romanized version. And yes, foobar allows me to do this. I am not limited to tags that author thought would be useful - I can write anything I want. And I can display them all, wherever I want, the way I want. This is probably why I like foobar so much - it is flexible and customizable!