I'm sorry to bring up a thread that's been inactive for a month, but I'm very much into freshwater aquariums especially with plants and shrimp (and people keep giving me their disused aquariums and enabling my addiction!)

I first got into the hobby bc my dad was getting rid of an old tank he never used (said it was 10 gallons, NOPE it was nearly 40) which I slowly made into a planted community tank with some driftwood I populated with what's become my favorite type of fish, CORYDORAS!

I love those wiggly chubs with their lil face nubbins so much, they have such personality especially my emeralds, which keep breeding lately and I'm gonna have to give some away or set up another tank....It's got a few species of tetras and rasboras too but the Cories are my favorite, We have a few Juli and Sterbai Corydoras, but the Emeralds outnumber them from the breeding now.

I've also got a 55g with an Albino Oscar ($10 rescue from Walmart before they thankfully stopped carrying live fish, he was nearly starved from other cichlids bullying him) and a Marbled Bichir which I love because they are so big and interactive, but as much as I love them, the Corydora species has stolen my heart XD

Second place I would give to female Betta fish, we had a "sorority" tank of female Betta and they got along pretty well (the males are the prettier, but really aggressive ones) but sadly since they have such short lifespans (or at least, when they come from a big name chain petstore), they've all since passed, but it was really fun how inquisitive and intelligent they were.