Last year (and the year prior) I noted every deck read with for clients - through their choice of between 7 standard decks, and up to an additional 5 decks which I chose randomly to take with me - for other readings, such as readings from the cafe (my choice of deck for the reader) ....
The most used chosen deck to read with (in order) where: (there are many variables which make this list as it is - Male/Female clients preferences, weekly readings for regular clients, age, familiarity, question.
Also of note: The Masquerade was additioned to the standard 7 at the time of purchase - later in the year. This list is 2006.
RWS
Masquerade
Gilded
Minute
New added decks for clients this year are (additional to the standard decks):
New Vision
Old Path
Robin Wood
So far chosen for 07: New Vision x 2/Gilded x 1/RWS x 1.