I've got two tropical aquariums at the moment. One in the study by the computer, it's a 4 foot x 1 foot Clearseal tank, with a variety of Corydoras catfish, 10 Black Skirt Teras, and a few remaining Neon and Glowlight Tetras.
My other tank is 450 litre 5 foot Juwel tank, which used to house some rainbowfish, a Black Ghost Knifefish, 3 Clown Loaches, 4 Siamase Algae Eaters, Brochis, Pearl Goruamis, and an L14 Sunshine Pleco, and 4 Angelfish. That tank had filter breakdown after christmas and most of them died. Then when I moved the lights broke. Since then I've been a bit demotivated on the fishkeeping. Once I've got a bit more money I'd like to get the tanks restocked, though this time when less species.
Before I moved into this flat, which is quite lacking in space, we had up to 4 community aquariums, and another 4 tanks for Bettas (Siamese Fighting Fish). We eventually combined these into less, but bigger, tanks. Far easier to look after.