I prefer AKC, too. It's more difficult and presents a greater challenge. NADAC courses are wide open and flowy, but unfortunately, too easy. I do enjoy some of their games, though, like Chancse. I mainly show in AKC and do NADAC if I'm starting a new dog or if the show is local.

Congrats on your Novice AKC titles! Open is fun, but Excellent is even more fun. You'll really enjoy it when you get there!