Okay, now that I have a little bit of time, I'll go into what I meant.
I'm not saying Beware the Vulture is the best system set, not by a long shot. I'm also not saying that if I was given every LEGO set, BtV would beat them all.
What I mean is it may just be my favorite. I've gone into a few reasons why, and while those may be semi-biased on the fact that Homecoming is my second favorite Marvel movie (even that includes some bias), it still is a really good set.
But, you may ask, why do I like this set more than Ninjago City, debated by some to be the best set every? Or the Slave I, the super-epic ship of your favorite Star Wars character? Or any system set with Ehlek?
To that, my answer is simple. Because I don't have them. Don't get me wrong, I can still like a set without owning it. I love those sets, they're cool to look at, and imagine holding. But that's as far as I can go. Without touching them, messing with the function, pressing down each and every sticker, clicking together every piece, scoping every pro and con, I can't enjoy them to the extent I can with my personal sets.
I still have sets I hold to high regard. D.Va and Reinhardt easily takes... second? Third? Okay, I have a harder time labeling sets in my list of favorites than I pretend to. Picking favorites is hard for me. But Beware the Vulture I don't feel bad about putting up there. I just have had so much fun messing around with it, it's crazy.
Also, though this doesn't seem too unpopular, Molten Man is my favorite Far From Home set. The Venice set looks cool, but I won't be purchasing it out of necessity like I will be Molten Man. Yes, the head is weird, but I'm hoping it will be better in person.
And War Machine Buster is the best Endgame set, despite it not have proper elbows. Quinjet and Hall of Armor are up there too, but the other two are really just "eh." I guess that isn't super unpopular of an opinion, though...