My aunt down in Florida is into the Fish World/Farmville thing. My wife & kids have been doing Farmville, my wife just got started with Fish World. I told my wife she is more than welcome to come downstairs & do some tank maintenance, a real life Fish World, oh what fun! She isn't buying that.
I haven't done the fishroom upgrade where she can sit with her cup of coffee, and key water changes into the computer. Something tells me that one is a long way off.
i play fish ville and happy aquarium but not happy aquarium much because its not very realistic. hint for fish ville: use all you coins on green snappers and put them is a separate tank, once they are grown up (about 4 hours) click "sell my fish" and you will get a 5 coin profit for each. i sometimes have like 300++ fish in my "sell tank"
I've tried all of them, but I really think that they are all very unrealistic. I like slightly realistic games, and I find those ones just plain boring. lol