It really does depend on what type of tank you want
Peaceful Community, Semi Agressive, Agressive,
do you want lots of small fish or just a few large specimens or even just a single fish display tank. Do you want to mix fish.
As SDS said there are quite a few profiles on the main page here, or for loaches
www.loaches.com for catfish at
www.planetcatfish.com
If you want cichlids do you want African or South American biotypes? You can't mix them but if you go African then look out for SteveAngela1 for Loaches look for Butterfly if you want Puffers look for PFP for advice.
If someone talks about one of their fish that interests you most likely they will have a picture of it in their albums.
the options are endless