I'm off to Australia this summer (again!) and as I can't stand to be on a plane more than 7 or 8hrs at a time I generally go in hops on one way tickets there and back. This gives me the chance to visit places en route for a few days at a time and gives me a chance to sleep!
Last time I went London to Dubai to Shanghai to Singapore and onto Sydney from there. Home was Singapore, Colombo and Dubai again.
Any other route suggestions? I have five weeks off so time isn't an issue. I have some money to spend but don't want to be throwing out many thousands!