I pity you. The de facto MP3 player for Windoze (Winamp) sucks eggs compared to iTunes.
Winamp is so terrible, it boggles the mind. My biggest gripe? Why is it SO DAMN SLOW at convertinbg filenames to mp3 tags? One by one, slow as molasses (even on my 1Ghz P3). The other thing that sucks about that? It only does this for files currently visible in your playlist! WTF? To get all filenames to change to mp3 tags, you've got to continually scroll down a page until they're all done, because only THEN are you able to sort by filename and have them be in proper order! SUXORZ!!
Oh yeah, no batch conversions of MP3 tags, no "show file" option, no categorizing by genre, butrate, or even album.
In short, it's a USABLE mp3 player, and I can see how anyone who has never used something better would settle for it. Just like Windoze itself...