The reasons I didn't went to it was because I couldn't see my self sitting for so many hours a day.
But I guess my destiny was different than I expected.
A few months ago I got an offer to participate in a 22,000KM journey called the 'Mongol Rally' which is basically a race when you need to drive from the Czech Republic to Mongolia in a shitty car.
Joining this race meant sitting in a car for at least 14 hours a day
I agreed to the offer without thinking twice
and after I finish it, doing the Trans-Siberian road looks like a piece of cake