As a Platinum I'd rather have consistency, even if the color scheme is a bit drab (unless I'm booked in a jacuzzi suite, my goal is to spend as little time as possible in the hotel room!)

I haven't stayed at a Courtyard in six months; almost forgot how they look like. I've stayed at a Hilton Garden Inn two weeks ago. Pretty drab to me, too. Marriott's designs are OK IMHO.