eschaton
Fishaholic
It seems to me, from my personal experience and reading on forums, fish-keepers fall into two groups once they are into the hobby for awhile.
One group of people are generally interested in smaller fish. These folks focus on community tanks with schooling fish. Tetras, Danios, Barbs, Corydoras, Rasboras, Loaches, and Rainbowfish appeal to these people. As time progresses they may move towards planted tanks and/or biotopes, obsessing over aquascaping, trying their hand at freshwater shrimp and snails, and potentially blowing large wads of cash on expensive lighting and C02 systems. While they may want a large display tank, they're more likely to start having tons of smaller tanks, potentially even nano-tanks. Outside pet interests probably include nano-reefs and keeping Poison Dart Frogs.
The second group of people are interested more in larger fish with "personality." This group gets attracted to large Cichlids (New World and African), various oddballs like Puffers, predatory catfish, and the like. If they have a main display tank it's probably a Mbuna tank or something similar, but for the most part tanks are constructed more for functionality than appearance. As time progresses tanks become larger and larger as new stock arrives. In the U.S., these are the sort of folks who may enjoy feeding live feeders to their fish. Outside pet interests probably include keeping of reptiles.
This is probably a gross over generalization (for example, I don't think livebearer line-breeders or betta fanatics fit into either category), but most people I've known seem to fit into these two groups. Feel free to chime in to support or detract from this theory.
One group of people are generally interested in smaller fish. These folks focus on community tanks with schooling fish. Tetras, Danios, Barbs, Corydoras, Rasboras, Loaches, and Rainbowfish appeal to these people. As time progresses they may move towards planted tanks and/or biotopes, obsessing over aquascaping, trying their hand at freshwater shrimp and snails, and potentially blowing large wads of cash on expensive lighting and C02 systems. While they may want a large display tank, they're more likely to start having tons of smaller tanks, potentially even nano-tanks. Outside pet interests probably include nano-reefs and keeping Poison Dart Frogs.
The second group of people are interested more in larger fish with "personality." This group gets attracted to large Cichlids (New World and African), various oddballs like Puffers, predatory catfish, and the like. If they have a main display tank it's probably a Mbuna tank or something similar, but for the most part tanks are constructed more for functionality than appearance. As time progresses tanks become larger and larger as new stock arrives. In the U.S., these are the sort of folks who may enjoy feeding live feeders to their fish. Outside pet interests probably include keeping of reptiles.
This is probably a gross over generalization (for example, I don't think livebearer line-breeders or betta fanatics fit into either category), but most people I've known seem to fit into these two groups. Feel free to chime in to support or detract from this theory.