Perhaps I can revive this thread.
I have played golf all over Indiana and a lot in Indianapolis.
My favorite courses would have to go in the following order, and having the following rating.
Victoria National (5+) - It's not even close, this is the nicest unknown course in the area. Impeccably maintained, but very challenging.
Bear Slide (5) - Great course in Cicero. Not too well known, so only good golfers here mostly. Specials can be had on golfnow.com for $37, a steal. Greens are not as fast as they used to be this year, sadly.
Prairie View (4) - Great course, but pretty pricey, I only play there for the $55 twilight.
Purgatory (4) - Challenging but fun course, but can also be pricey.
Crooked Stick (4) - Great course, sneaky in how strategic most holes are. Only a true golfer will appreciate the subtle challenges Pete Dye put in. This course is famous more so for its members than the course though.
The Fort (4) - Beautiful golf course, but attracts some hackers, so can be a slow round.
Ironwood (3.5) - Great golf course for a good rate. Never terribly crowded. The 6th and 7th on the lakes nine are two of the prettiest holes in Indianapolis.
I have played just about every course around Indy, so if someone has a question, I'd be happy to answer them.