I want all the amps, too!
But I still like big amps. No idea why, since I can barely lift the ones I have.
Somewhere in the past I heard the phrase, “Always get the big engine.” I must have taken it to heart with amps and gear! In all seriousness, one reason I like big amps is that the transformers can be larger, and that “big iron” thing turns out to matter a whole lot for tone.
Transformers also make a big difference in studio gear, even though they’re not big and heavy with studio stuff; one reason the classic Neve consoles are still highly sought after is the St. Ives/Carnhill transformers on every mic input and channel. Same with the classic Neumann, AKG and Telefunkens mics. They matter.
Once again, I’m kind of a freak over this stuff, YMMV.