Purgatory - I thought was outstanding. I was expecting the course to be gimmicky but instead found a very very good golf course
The Fort - I liked, but not as much as some on here. I would take Purgatory over The Fort (have played each only once though)
Coffin - Fun place, mix of good holes and a few holes that seemed to be so bad they were good
Indiana University - Quite a few good holes there, haven't played it since the renovation.
JAL, your post seems a good starting point for my thoughts:
I agree on Purgatory, and have said before it's too bad the owners saddled it with the extra-long par 5. The course deserves better pub than that.
The Fort is my co-#1, along with Purgatory.
Coffin is an outstanding design ruined by poor maintenence and bad drainage.
I played the IU course once, 8 years ago. I was still really a beginner and found it an impossibly long, boring slog. Now that I'm a little better player, and somewhat better informed about golf course design, it sits in my memory as an impossibly long, boring slog. That rumored redesign can't come soon enough for me.
Purdue Kampen - In my opinion a top-ten course in the state. I found the par 3s to be a bit repetitive, but the rest of the course demands a huge variety of shots.
I also like Bear Slide and West Chase. Plum Creek is a good, not great Pete Dye design that is waaaay overpriced, but worth a look in the Carmel area.
I played Legends of Indiana once, and have not seen a reason to go back. Yawn.
Eagle Creek, even with the universally-lamented breakup of the original Championship 18, is to me still an enjoyable early Pete Dye course, at least what's left of it. I have not played it for a few years though, so I'm not sure how the 9 newer holes have assimilated into the original 27.