Well, my list would be exhaustive, but I'll skip pulling out a hundred books just so I don't forget anyone and just go off-the-cuff.
I adore:
Art Nouveau- everything, everything everything
Klimt
Tiffany (I studied fine glass arts/crafts and then switched into technical and scientific illustration)
Henry Moore
Vermeer
Albrecht Durer
William Morris
Aubrey Beardsley
European Renaissance Masters- pretty much all of them- mostly from the south, but some of the northern artists really capture my eye/mind too
Frank Gehry (I don't really like much of his work, but I am amazed at his innovative spirit and openness to trying what everyone else would say cannot be done- I guess I like him as an artist more than as an architect... not yet history, but he will be one that everyone remembers for sure)
Norman Rockwell
Boy, I was thinking that it would be more accurate to name pieces that have changed my view of life, but that list would be much, much longer.
My 'I do not (typically) enjoy' list is short because it is rare that I don't enjoy or connect with absolutely anything a creative person expresses. Here goes:
Miro- I've never seen anything of his that didn't conjure up some sort of really creepy image (or feeling) besides the one he painted.
Aubrey Beardsley (I know he's on both lists...)
Dale Chihully- hack, hack, hack, imo- he's not yet history, but

I wish...
Hmmm... I can't think of anyone else...
My brain is tired

I love art history though too, and for me it is as the history of the world, so I place a lot of importance on learning it and understanding it as well as I can from a retrospective look at (possibly revisionist) history. Dh is a philosophy (including the history of) buff and we really enjoy conversations about the interraction between these two 'worlds' of history; we've both had a lot of understanding come from the collision of these subjects.
