I see a lot of people picking Fuuto primarily because other Rider worlds would scare the **** out of them.
I mean think about..........
Kuuga's world/Agito's world, Grongis and Unknowns pop out of nowhere and scare the **** out of you on notice.
Ryuki's world, your ass could mysteriously be dragged into a mirror without no possible warning, then get eaten alive.
Faiz's world, you don't know whether the person next to you is an Orphenoch or human, and if you piss them off the right now, they'll immediately burn a hole in your chest and turn you into an Orphenoch.
Blade's world, very similar to Kuuga's & Agito's world except replace Grongi/Unknowns with Undeads.
Hibki's world, giant monsters and cats that can walk on two feet and eat you.......enuff said.
Kabuto's world, same concept as Faiz's world except a "clone" of yourself is involved
Den-O's world..................actually no1 would wanna go here regardless if it was scary or not
Kiva's world, glass vampire-like creatures that are similar to Faiz's orphenochs in a sense.....so just take the example from Faiz's world
But the reason with Fuuto being the popular choice is...........
Fuuto/W's world, enemies require Gaia memories to transform to monster. Monsters are easier to detect just by hearing the "Gaia Memory" sound, and it seems there is a reliable police squad around LOL
With that being said, the world I pick is.................
"I'm a passing through citizen, remember that" LMAO