Well, wouldn't you know it, the whole ordeal ended up having a happy ending. My Super ended up having to call a plumber friend of his, who set aside some of his other jobs to come over to my place first (he even got a call from one of his other jobs, some old lady who was mad he was late). Fixed the issue in no time, and on the way out, stopped to ask me about the collection- how long it had taken me to accrue, all that. I told him I try to donate some stuff at least once a year, and he joked "So which one you gonna donate to me?" He noticed the Black Series, and we had a short but sweet little chat about Star Wars, and he told me what a big Vader fan he is. So I let him have one of the Vaders; I have more of them than I need, and I'm not picky about all the details, so one can easily stand in for another (not to mention he's perhaps the easiest figure to find right now). He seemed really taken aback by it, but in a good way. Said he wished he could've stayed longer to talk Star Wars.
Maybe like 20 minutes later, as everyone was starting to wrap up and it was just me and the Super, he got kinda close and started talking real low. I figured it was gonna be about the pipes, but he started asking some questions. Said "You got some interesting stuff here. Some of it's probably quite valuable". I told him it was likely, but I was more concerned with sentimental value. And he goes "You've heard of the X-Men? Do you have any of them?" I just kinda smiled and showed him my little X-Men shelf, and after a moment, his face sorta lit up (as much as a big, gruff dude's face can without betraying his pride) and he just said "Nightcrawler. Nice." And then switched back into business mode.
Was honestly kinda heartwarming to see. I shouldn't be surprised- we all have our inner child, and they're never as far away as we think.