It's so difficult to make a list because I want practically EVERY fish & invert out there! So I'd just have to say thousands and thousands of 5000 Gal(or bigger depending on the fish) tanks with all different species in, I think I'd have a different theme in each. Probably start off by having diff countries as a theme and try and get fish from that specific country.
I'd also have lots of rescue tanks for fish that grow large, I'd have a few dedicated just to common plecs.
I'd also love some impossible equipment, like self cleaning tanks, filters etc, so you could just watch the fish ad build your collection, can you imagine the maintenance on all those tanks, I'd have to hire an army of tank cleaners to keep them in prisitne condition LOL
A realistic dream tank would be an oddball community about 600Gal.
A dream tank that I'll actually be doing is for my goldfish when I get them a nice large new tank, it will be a japanese village theme. I'm going to have it densely planted(not sure whether to go real or fake) have a clearing in the middle with a few little pagodas, some tiny japanese figures and the main feature will be a bridge with some blue stones under it(to look like a lake) and big white stones around that as a sort of barrier. I'd prob have a very neutral tone substrate or black or white gravel.
My other is going to be my black & white tank full of albino fish, can't wait to get started on them both
