Advice?

As you should know by now, I'm an avid traveler (why are those words always paired?).  I am lucky enough to have many holidays to take advantage of this wanderlust. I am looking to the end of the year and trying to figure out where to go.  I won't be going home for Christmas since I have to work until the 23rd of December.  It would just be silly to rush home for a specific day.  Instead I'll travel for about six weeks. I'd like to hear about places you've been in Asia.  Where would you recommend? Where would you skip? How long do I need to see that place and what are the points of interest?

I've been to most of Vietnam, Phnom Penh and Siem Reap in Cambodia, Singapore, Kuala Lumpur, Penang, and Kota Kinabalu in Malaysia, Yogyakarta, Padang, Bogor, and Bali in Indonesia, Hong Kong and Macau.

Where next? Should I just throw a dart?

All suggestions welcome.  Even secondary.  If a friend went somewhere and loved it, pass the word on to me.

I am really considering a return to Vietnam, then Laos and/or Thailand.  What about places in Indonesia? Where are the cheap flights? Cheap hostels? Good food?

I'm still making a decision about next year, but I'll put out an all call that this may be the last time people can come visit.  No guarantee I'll be here next year so take advantage now, or soon.