I prefer vinyl and have been collecting them for.. oh, lets say 3 years or so.. I have about 170 records (including 7''s and 10''). Haven't bought all that many cd's for a long long time, except for classical music - but metal needs to be vinyl!!! it doesn't feel right elsewise
but honostly i don't play them too much... wouldn't want them to "decompose" like Zad pointed out. However, it depends on the recordplayer and the needle, and mine is a rather cheap recordplayer.. so.... on the other hand it doesn't matter that much, it's mostly black metal so you can hardly hear the extra layer of noice anyway.
My youngest little sister also collects vinyl, but she on the other hand loves the sound of old decomposes vinyl with all their "click... click" and warm noise.