To me a "serious" collector has a lot more money than I, but probably doesn't enjoy his "collection" any more than I do. I have the guns I have because I like them, shoot them, and enjoy shooting them either at the range, or for varmints. I gave up deer hunting - too many people out there who don't know what they are doing.
I would have to agree with the majority of the comments that say whatever you consider to be your collection is a collection - be it fancy or utilitarian.