Freedombel, Welcome to the addiction.
There are many more hostas out there than just the "green or variegated" ones. The colors of the hostas can be so subtle as to entrance you in the gardens. But remember, don't over look the plain green ones, they too have their place. They will calm a busy garden and make it more relaxing and tranquil.
Here is a link to the Hosta Library
http://www.hostalibrary.org/ Have fun looking at what you can find in the world of Hostas.