Like a few others, my first Flynn was also the Cascades. A few highlights from my memory.... the stretch of #5-10 was I thought the best part of the course as it sports an interesting par 5 in #5, a very well thought out par 4 in #6, a difficult tee shot on #7, a great 2nd shot on #9 with the bullseye up in the trees, and just a cool short'ish hole in #10 (don't hit it too far). #12 and #13 were also very solid holes with some depth perception issues due to the usage of bunkering to create optical illusions.
I'd be interested to see what you think of a 5-5-3 closing stretch as well. I thought that was a bit out of character for the whole course... sort of like Flynn crammed it together.
Enjoy!
ps - if you don't get to play the Cascades, the Old Course (Ross) is also an interesting, sort of quirky little track that's very fun.