Ive got 3 55's, and a couple small tanks. I plan to get something around 150gallons here soon. If you want color, you either want Saltwater, or African Cichlids. If your a beginner, you wont want Saltwater.
These arent my pics, but these are some of what I have:
Cynotilapia afra (Likoma)
http://img236.echo.cx/img236/3725/cynafralikoma013us.jpg
Labidochromis caeruleus (Lion's Cove II)
http://img236.echo.cx/img236/5606/labcaeruleuslion2011ad.jpg
Metriaclima estherae
http://img236.echo.cx/img236/341/metestheraered015df.jpg
Melanochromis cyaneorhabdos
http://img236.echo.cx/img236/8421/melcyaneorhabdos012xb.jpg
Metriaclima callainos
http://img236.echo.cx/img236/9593/metcallainos011le.jpg
I have more but, that gives you an idea. These arent known as beginner fish but, they arent hard to keep healthy. I should have some fry before long.