I just firmly believe that vinyl is the superior medium for music. Warm analog sound is a plus but a large part of it is the simple tactile pleasure of placing a 12 inch platter onto a player and watching it spin. 12 inches provides for much bigger (and thusly more satisfying) cover art as well. Metal especially, I believe is intended to be on vinyl.
There are other reasons though. You see, when you put music onto compact disc you have to convert the sound into data. In doing so you must devise a compression scheme, and when compressing music to fit onto digital mediums the first thing it does is cuts out frequencies in the music that fall above and below the human spectrum of hearing. So when you listen to the CD, you are missing something, you can't tell it's missing but you know it's there. Then when you listen to it on vinyl you can tell the difference. Of course this only applies to music recorded analog, but many bands still do record in that medium.