I love all that stuff too. I have 2 10 G, one with a Betta, danios and assassin snails, the other with cherry shrimp. I want to add some Marimo balls. For my next tank, I want to do a "sorority" of female plakat bettas. I really like rimless aquariums but I have an idle 30 G with rims that I may as well use. I'd like to get into saltwater but am not really ready.
A paludaruium would be cool too, I have this vision of one in a large shallow rimless tank, white sand, female bettas, and a island made of a driftwood and rocks, planted with mosses and maybe little mangrove trees and other plants. The island would be above the edge of the (open top) tank, inhabited by red/purple(?) devil crabs. Jumping might be an issue though.
As far as terrariums, my mom has this awesome polyglobe(?? Flat sided orb, there's a word for them) terrarium... I want a larger one for plants, maybe with rhino beetles, that would be really cool. A sensitive plant might do well in a plant only terrarium, I had a baby one and it got bugs and other issues and kicked it.
(I also want a greenhouse and a pair or trio of argus monitors to live in it, dream on lol)