I have always collected something. Rocks, star wars, raiders, ET cards, etc.
I really got into collecting big time when I moved out on my own. I have a lot of stuff, but I'd never let it get to the point where they's just pathways through my house.
I think it would be great fun to date someone with the same hobby. I do all of the geek things by myself like the cons and such since my sister passed away (Sputnik on the forums). It would be nice to share that with someone. Can you imagine though, if you each had your own collections, the fights that would go on for room in the house to display.