Where are your characters, from?
In fantasy and scifi characters can come from nowhere at all, or places of deep scenery and rich culture, backwater desert planets, or the lush evergreen forests of a farmed an cultivated earth.
Where your character comes from determines who's paths they cross on the way. Who stand in their way, and why they do the things the do.
Places like the desert can be made of mistery, build from legend or composed from myth. But weather or not your character is traveling to, from, avenging or destroying the place they are from. The place they hale from can shape your character in ways you can't even think of.