Waverly Academy was really cool. I liked that you could talk to the people a lot more and the girls really reminded me of the girls at college(unfortunately).
I was considering the 12th one...I'm just going to buy almost all of them on bigfishgames.com b/c I have that 6.99 free 1 month membership thingymajiggy.
So far I've played Shadow at the Water's Edge, Warnings at Waverly Academy, working on Curse of Blackmoor Manor and had to order Secret of Shadow Ranch on amazon due to bigfish not having it. I'm becoming an addict