Hi Manu,
The length of the tour. Visually, the tour was fantastic. It really opened up my eyes to some really breathtaking scenery (even if it is MS default). When I touched down back in London, it was a fufilling achievement. I am still sifting through all my screenshots to put together a slide show.
I really wasn't looking forward to the Africa portion after dodging rocks in East Asia but, I was surprised to find out how little desert covers the continent. (naive on my part I know).