Actually, f-mattox has sailed more Princess ships than I. I'm trying hard to remedy that
I was on the Aloha deck on the Sea Princess, it was a great location, midship. The Sea, Sun and Dawn don't have a bad cabin that I know of, though. So easy to get around.
Travel Bugs, I'm so happy to hear you're doing the Panama Canal. I had booked that itinerary, but had to cancel due to the economy. I'm hoping to do it one day soon, though!