Optimum Cycle Progression (thx to Hid)

In the Bike Handling Bullsh@@ post, Hid mentioned his optimum cycle progression. I thought this might be a cool subject on its own. So here’s mine:

Tricycle (no Big Wheels, they came out after I was already too big for them)
Schwinn Orange Krate
24" 10 spd and BMX bike
27" 10 spd
Track bike
700c road bike and Mountain Bike
Tri bike

Nooby Dooby Doo