Yes, I collected so many things (and still do) that I had to restrict what I collect due to storage issues where they are kept. Some of it is in safety deposit boxes at different banks for obvious security purposes. Basically if it has monetary value, I probably have a collection of it hidden somewhere. Examples of what I collect: old Chinese vases/carved jade items, early US coins, old comic books (pre-1970s), pre-1900 stamps (US and foreign), vintage video arcade games/video game systems, vintage watches, etc. My close friends think that I am a money hoarder, but that is not the case as I am not rich, I just happen to have the ability to be at the right place/right time to buy stuff cheaply. Having said collections has paid off a time or two when in a financial pinch.
As for D&D, I played it one year as a kid. A good friend of mine got me into it. We quickly got board with it and basically gave up on it. That was about the time I got my first Atari 2600 system. Hard to compete with that...