Season three could either be the best season or the end of it, Dexter is already so great that its hard to believe it could get any better. I can't wait to see how the character dynamic changes in the next season. I get the impression that Laguerta is going to get all suspicious about Dexter and Doake's suspicions of him but the writers are so good that you can never really tell.
I've watched both seasons 3 times over now! I wish it was september already!!!