I really love aquariums and contained ecosystems. I really find it fascinating of what you can learn while keeping life in a finite volume.
Shrimps, nano tanks and Walstad tanks (a.k.a. dirted tanks) are just a few of my favorite things. I do have a soft tooth for bettas... I used to love them, then hate them and now love them again... It's been a bumpy relationship.
For me aquariums are not about keeping fish, but creating a miniscule of what you can find in nature; and sometimes places that you can never find in nature.
I hope you enjoy!