"Next Step" Games

Podcast Episode Featuring This Top 10

So you've used what we call a "gateway" game to get people in the hobby. So what's next? Say, you use "Ticket to Ride", what game do you use next? Vote for your top ten "next step" games, the ones you use AFTER the gateway game.
People's Choice
#10
#9
#8
#6
#5
#4
#3
#2
#1