Of the ones I got to play.
1 Sawgrass A constant test of focus and ability to control the ball
2 Woodlands (no longer a TPC) Lots of good, testing tournament holes
3 River Highlands CT Another fun course, testing a lot areas of your game
4 Detroit Played a bunch of charity pro ams there, was fun
5 Memphis Was a slow, sloppy mess until they fixed it recently
6 Summerlin Played and practiced there a lot (90's) Was a great practice course for tour conditions.
Dishonorable mention
Eagle Trace Played in many wind days, and it was stupid. With no wind, a decent, testing course
Heron Bay zzzzzzzzzzzzzzzzzzzz
Please God never again
Jasna Polana A tough neighborhood, but tough to say anything positive about it. The mansion turned clubhouse is cool