Westside8, nobody has addressed Sabah. My favorite activity in Sabah was climbing up Mt Kinabalu. Even though it is just a hike, to an elevation of 4100m, not a technical climb, you are forced to hire a guide. But the guide did show us pitcher plants on the way up, and we would never have found them on our own. There is a hut 2/3 of the way up where we overnighted. They have a small restaurant there which is reasonably priced, extremely reasonable considering that everything you eat comes up on somebody's backpack.