To me, the number of posts is not necessarily a seal of quality for the poster
I don't know if you ever visited this forum before it closed down temporarily, but in the "good" old days, we had these branches called Women Traveller's and Your Choice. So you don't need to tell any of us "normal" regulars that the number of posts is no guarantee for good quality content.
And you, Lucapal, Mikehuxley and Aribo, where would you go if you had to do a RTW with $25.000 and 6 months? To add some challenge, I would add that you must go to at least 2 different continents on that trip(excluding your own continent of departure). Where would that be and why?
First of all, I would not commit myself in advance to something like "you must go to at least 2 different continents" - I'd think I had the right to decide where to go and for how long entirely by myself, if I were to spend 25K of my own money on a trip.
I would first fly to the area I've always wanted to see the most - which in my case would probably involve training it from the Netherlands through Russia and Mongolia to China, then on to SE Asia overland. Where I would stop and for how long would depend entirely on how much I like the place; I might like, say, Beijing so much (not very likely, but hey - we're speaking hypothetically, right?)
that I'd decide to settle down and do a few months' course in Chinese there.
Or I might fly to South America or Africa and make an overland journey instead; anyway, I assume you got the point.
As for the touristy part of the journey, I would mix a few days sightseeing with a few days lounging - I'm not a beach person but I do need to wind down every now and then with a good book and a cold beer.

