I've only played three of his courses. All in the Coachella Valley.
The Mission Hills course is in the valley sandlands, which one might suggest is great land in the right hands, as long as you had the right piece of ground. That course has a few Dye templates, plus a handful of fun originals.
I played PGA West - Stadium for the first time. Flat sandy ground. I got my ass kicked, and had a hard time enjoying the course. Relentless attack on your sense of fear. I liked the Nicklaus across the way better.
The best land is La Quinta - Mountain, tucked back into a natural cove, away from the big wind. But the transition from flat valley to steep, jagged mountains is abrupt, maybe only a couple thousand feet. That's pretty good ground. I don't know how much land he was given to work with, but the course is overall very charming, not too tough, with some real nice holes tucked against the mountains. It's not often you can use the edge of a mountain to defend a second shot into a par five, but here he does it twice. Good golf course.