Hello erossscotland. and welcome to cruise-chat;
are you doing the 16 day Bangkok to Beijing or the 32 days to Anchorage? If the latter, you are really going to appreciate one of the perks: complimentary laundry and dry cleaning. I know, we've all heard horror stories about laundry services on ships, but I've used them a couple of times now with very good results.
You receive all of the same extras as the Elite Captain's Circle members; mini-bar set up, deluxe canapes delivered to your suite on formal nights, internet access, upgraded cabin amenities; and some just for suite passengers; fresh flowers, luxury balcony furniture, DVD/CD player and free rentals, and more that I'm not remembering at the moment.
I have not had the pleasure of cruising the Far East yet, so I can offer no suggestions on ports. But I am very familiar with Diamond Princess, so if you have any questions on the ship, please just ask.
Have fun planning. This will be an extraordinary cruise.