I had a few smallish tanks back in the day, usual with just your standard sort of tropical fish (angels, guppies, platys, cichlids, etc)..
Accidentally bred a heap of Angels at one stage and just palmed em off to a pet store..

Would love to get back in to having a tank again.. As others have pointed out, it can be a bit of a wallet-destroyer getting a decent setup though.. (not to mention time consuming if you have a lot of tanks that need cleaning..)