Yo, I'm someone who always has to collect things, even as a kid I was like that. There has to be SOMETHING for me to collect. As a child it was Star Wars and Mighty Max toys, in my teens it was Transformers and GI Joe toys(which for the most part I have sold! to buy music!), as well as maiden/priest albums and countless comics. Now I've just gotten into collecting vinyl records, to go with my existing collecting of music (particularly Frank Zappa albums, I have a promo sampler of his on vinyl and around 65 albums on CD), with a CD collecting of like 450 albums or something, maybe more. I'm quite happy now with collecting music, and think I can stick to it for good. It's a total thrill to go into a charity shop or something and flick through their vinyl, knowing for £4 or something I can get a captain beefheart album. And the sound quality truely is greater. I truely love music, it's like the greatest thing ever, and the more I can get of it, the better. I don't get people who just use spotify and the like, it's inferior quality sound due to being in a lossy format, and you don't get the experience of handling something solid. I am really enjoying with Vinyl that you have to slowly take it out, you have to flip sides, it makes it something precious and very real. In the summer I'm gunna get myself a one-off 7" pressed of my own music, just for the novelty, and self-important prestige.
FUN FACT: Acid Mothers temple collect vinyl and on their current tour, they set a task of 100LPs each

So, do you dudes have any collections? what do you get? why?

isn't it pretty much proven that cd's have better sound quality than vinyls save actual masters or whatever. i could imagine that vinyl has better tone on it than sound though, just sounds more pleasant/alive due to the organic format it's played from.
i pretty much collect samples, sounds, segments, songs, anything that evokes something in me. it's a search for my music creating. recently though i've started to collect anything that does something interestign  to me. i-i have become...a RAGNAR- i mean A VAMPIRE.

there's still a major debate about that, and I don't think it will die down. Not aided much by the fact that most CD releases now are equalised for mp3 use, so it's overly normalised and smushes the more subtle sounds. I now only use mp3s when on the move or checking out stuff. Generally as a rule, me, and a few others that I've spoken to follow that vinyl is better up to the mid 80's, stuff released then on was recorded digitally and mastered for CD, whilst analogue recordings sound better in an analogue medium.

Ultimately, when vinyl masters get converted into digital, it will artifact at each stage, as does all digital information, and it's different from when analogue loses quality due to overdubs or whatever, it becomes for a better word 'pixel-like', and it's something I've come across when making my own music, when stretching stuff digitally, you realise it's all little bits which build up the sound, and so it creates a tremelo effect, but analogue, it stretches the sound and it's still continous. I think maybe out ears can pick up that tremelo, even though we aren't conciously aware of it???

Also there's the fact of the sleeves, which are at times, works of art, and it's just WOW.