Oh yeah, if is get into the childhood lines (outside of Star Wars), Joe and He-Man would be at the top of the list. I never had huge collections of any line in particular (wasn't spoiled enough I guess 😉), but those three definitely topped the list. I had a close friend who between he and his brother had nearly all the Joe stuff, and i have fond memories of bringing my stuff over and combining it with theirs for a lot of battlin' fun.
I probably had the most larger He-Man stuff for some reason, must have been what my parents liked to get me. I was fortunate enough to have both Grayskull and Snake Mountain there. I always wanted Transformers, but didn't have a ton of them. Again, ended up with a lot more Gobots instead (probably way cheaper).
Also liked things like Super Powers, Secret Wars, Thundercats, Silverhawks, MASK, and a little later Ninja Turtles - which was kind of towards the end of the "toy playing" years. I've been watching a lot of Retroblasting on YouTube lately, and it brings back a lot of those memories. Sometimes it makes me want to focus on vintage toy collecting.