I've only recently starting picking up some of these, and I've had mixed reviews. I'm looking to pick up a few more, so I'm interested to hear what you guys like.
Art of Star Wars: Episode III - Amazingly good. I loved the layout, and the blurbs that accompanied an image almost always had a really great anecdote describing how it came about. Its always great to hear what was going through an artist's head while he was designing something. The art is shown by the dates it was assigned - before there was even a script in some parts - so you get a cool look at the movie itself evolving as Lucas tries to figure out what the fuck he's doing.
Art of Star Wars: Episode II - Bear in mind I bought this one AFTER the Episode III art book, so my expectations were very high. Unlike the Ep. III art book, this one had the art listed in chronology with the FILM - scene by scene - rather than when by when it was assigned/completed. The blurbs were disappointing, and rather than have the blurbs directly over/under the image in question, they were numbered - then you had to go find the impossibly tiny number hidden somewhere on the picture itself. Drove me insane. The art itself is brilliant, of course.
Boris Vallejo and Julie Bell Sketchbook - Decent, though the descriptions of the images were amazingly skimpy. It sometimes felt like a Dick and Jane book written by Bizarro. "Julie and Boris draw unicorn art picture. They am good at art. They heart art!"
The Art of Star Trek is pretty neat. Great descriptions, great in-jokes, and great backround stuff. They even have some pages dedicated to William Ware Theiss, the guy responsible for the rediculously revealing costumes of the Original Series. The guy who was quote as saying: "The sexiness of a costume is directly proportional to how likely it appears to be that it will fall off some time during the episode"
I have the Art of Star Wars Ep. II, it's great to look at (though I hear you on the tiny number thing. augh). The Art of Halo, The Art of The Matrix, and The Art of The Fellowship of the Ring are also some of my favourites
On a different note, I've also got The Art of Werewolf: the Apocalypse, an RPG game. Some really nice stuff from Steve Prescott and Ron Spencer in there.
EDIT: Does anyone know if there is a Half-Life art book? I think it's called 'Raising the Bar' or something like that.
I'm in posession of The Art Of Halo, although without any other 'art of' books I'm lost for comparisons... I can vouch for the comprehensive illustrations, though - heavy focus on characters rather than locations, unfortunately, but every stage of the main characters' development is shown starting from Halo's concept as an RTS game. Great for alien studies.
The Art Of Animal Drawing by Ken Hultgren See some scans here! Excellent for gesture drawing, charicature and basic movement ^_^
The Art of Totoro What can I say? I'm a sucker for Miyazaki's watercolors and Ghibli's background art. Really, any of the Studio Ghibliart books have yet to disappoint me.
The Art of THe Lion King Inspired me as a wee one to get into animation. Now that I look back on it, Chris Sander's concept art and color studies were really amazing in that book. Also check out The Art of Lilo and Stitch for more of Sander's goodness, there's some great watercolor work and linework of Nani