appealing to me... but would probably end up being cool just the same. Get that out of the way. West Coast of South America would be alright... But then you hit that South American East Coast stretch....and that's where I feel like I would be loving life. That, touch Africa, those cities in Europe before back in Edinburgh. That's the route.
That being said, I'd rather just have a home base and work through one continent if I had 120 travel days.