I've done 2 RTW trips. The first for 7 months covered Japan, Hong Kong, Thailand Malaysia, Singapore, Oz, NZ, US and Canada. The second for 9 months covered South Africa, Oz, Thailand, Laos, Vietnam, Cambodia, South America and Central America. Many other short gaps and long weekends since.
Sadly long trips like this are probably a thing of the past but I still plan lots of adventurous holidays. Over the last couple of years I've been to Everest Base Camp, climbed Kilimanjaro and visited China, India, Burma, Cuba and Southern Africa amongst others. Upcoming in the next few years I want to go to Israel, Tibet, Bhutan and Antarctica
In no particular order - Bolivia, Patagonia, Nepal, Cuba & Hong Kong