I have all the Classic Space LEGO I set out to collect; obtaining missing pieces and replacing broken ones from sets I've had since the early to mid 1980s. After that I felt more of less complete and satisfied with my LEGO collection.
Sure, I'd like to have the Classic Castle sets and fix up the spotty collection of 1980s Town sets I also have, but it just doesn't seem as fun when I'm not playing with them like I used to as a child. They look nice all built and on display, but I enjoyed interacting with them and I, um, can't really do that as an adult
My favourite LEGO was the 970 lighting set from 1978. I had many hours making all sorts of models and houses that used those wonderful lights. I only have a couple of original bulb bricks left, and not much wiring, but they bring back good memories. I always wanted the lighting from the train sets I saw in catalogues but never got them.
My brother is always telling me to "Put that Space LEGO away!" I think he's embarrassed by it
I miss my LEGO...