Voltairean Travels

Voltaire writes in Candide, "Travel's the thing." He continues:

Such is the desire to be always on the move, to be somebody, and to show off about what you've seen on your travels...

However, he further writes:

When one is reasonably content in a place, one ought to stay there.

I am more than reasonably content with Japan and Hong Kong (especially Japan), but there is still so much I want to see and experience in the world. But is that not what travel is - to leave for somewhere new, to explore, and to return from whence you came with tales of your adventures? But long-term travel? Constantly moving about? Is that still travel, or is that where it becomes wanderlust? Wanderlust seems to imply perpetual unhappiness - no one place is good enough. Should we keep in check wanderlust or allow it to become our very guide through life?