Let me clear up the DBZ manga thing. Dragon Ball and Dragon Ball Z are two seperate manga series here in the states, but in Japan, they were originally just Dragon Ball. The japanese anime split them up, and the american anime split them up as well, so to avoid confusion, Viz just put Z on volumes 17-42. I'd also just like to say when you do own all 42 volumes, you have to have a helluva lot of shelf space.

Favorites:

Movie: Kingdom of Heaven (Director's Cut)
Book: The Lord of the Rings
Game: 1. Super Mario 64 (DS or N64 Version)
Manga: Death Note (Dragon Ball being a close runner-up.)
TV Show: "24" tied with "House M.D."