It isn't the imagined desire that is significant, but the actual fact of having done it.
Well, not exactly 
Intention was to leave that part open.
I am equally curious about people who never traveled - whats stopping them - desire, ability (time, financial or passport limitations)
Same applies for people who have traveled. Personally after spending a lifetime of travel for business and pleasure I still enjoy it and largely have the means, except for some recent time constraints.