hey, they are by fav series of games so far for any console i have had. (i have the games both for xbox and ps3)
i love the series due to its action and conspiracy, also due to the fact i can study while playing as i am an art history student.
its true that the detailing gets better but also that the gameplay becomes easier as the series evolves. i have yet to complete ac1 100% (im close), i have completed ac2 98% (missing a trophy or 2) and i have completed ac brotherhood 100%.
i hope the next game has a long and intricate story, as ac brotherhood seemed too short.