I would have to go with these three as my top favorites:

1. Maxfield Parrish

I have about twenty of his prints (original to the era) around the house, all different, most in the original frames.

2. Alma Tadema

I try to emulate (as best I can, which isn't saying much) this man's view of what life was like (however historically inaccurate) in his ancient settings. This particular image I had plotted out to encompass a set of french doors in my house, to use instead of curtains. Love how the outdoors backlights it, giving a soft glow to the living room.

3. Alphonse Mucha

I was collecting these even before I knew what art was. A postcard I got as a kid (4 or 5) and had it taped to my desk for years. Now long since lost, but I have stacks of calendars, hard drives full, and more of this man's art. He encapsulates everything that was Art Noveau, anything else doesn't come close. IMO, please no flames, my opinion only, and it won't change.

...Insert some witty or thought provoking comment here...