I thoroughly enjoy
http://www.mydivination.com because of
their extensive database
of decks & spreads one can utilize
depending on their preferences & specific needs.
My favorite decks have to be:
Hawai'ian Aumakua Cards
The Anubis Oracle
Archetypes & Shadows
Mixed Emotions
Again, depending on my specific needs.
I'll even cross analyze a situation utilizing
different decks to look at various components:
energetic, mental, physical, etc.