I figure this is a good way to get the conversation going.
We currently have one community tank with a dwarf gourami, corydoras, neon tetras, a small colony of cherry shrimp, an assassin snail, and a plague of ramshorn snails that hitched a ride on some water lettuce we bought a few years ago.
I have nine tanks. Two are community tanks, three are Betta tanks, three are shrimp tanks, one is a snail tank. All are heavily planted.