Prior to about 14 months ago, I had never (that I know of) played a course designed by one of these "marquee" guys.** But since last November I've played a couple of Tom Fazio courses, a Nicklaus course, an RTJ Jr and an RTJ Sr. course. Now I finally have an appreciation for "good" golf course design. Of those, I think the one I played yesterday was my favorite design (RTJ Sr.) followed by the RTJ Jr. designed course. I still have yet to play a Donald Ross or Pete Dye course.
** Well, I had played Torrey Pines since it was redesigned for the US Open in 2001-ish by Rees Jones, but he only tinkered with a couple holes, really, so I don't think that counts.
I'm a huge fan of the old "country club style" courses: small elevated greens, false fronts, tree lined fairways, etc. A.W. Tillinghast is one of my favorite classic designers. RTJ also has some really great ones, as does Fazio, but I guess he wouldn't really be considered a classic designer, per se. I don't think I've played a Pete Dye course (yet).