Although I don’t probably have the amount of LEGO that you guys do, I have been having the same thoughts overall with my collection. It isn’t that I don’t enjoy it anymore, quite the contrary, but we just don’t have the room for it all. Over the past year plus I’ve been downsizing the amount I have on display, to have a cleaner, non “a toy store threw up here” look, which has lead to packing stuff up (and then to selling stuff). I’ve always liked the idea of “when something comes into the collection, something must go out”, but that is sometimes easier said than done.
Like your story Dave, I got into LEGO because of our daughter. I have so many fond memories of building LEGO with her, which led to me starting to buy some sets as well (I never had any as a kid). Now that she has kind of lost interest, and packed all of hers away except for one (TFA Falcon), I’ve done much the same. I only have my OT Falcon out and displayed (as well as a Mega Construx Castle Grayskull). Everything else has been put away. I only ever picked up OT sets, so I don’t have a ton, but still quite a few.
Much like with action figures, it is difficult to purge them. I truly do admire those that can and do. I’ve sold off a lot over the past few years, but much of it has been non-SW, so it was a little easier. I always disliked the idea of having so much of my collection in totes in the basement/garage/etc, but I know I have 12 or more full as I type this. Seems silly.