I recently hit #250 which I'll get to in a moment, but having searched back I'm not sure I've ever listed my milestones..
1. Wild Mouse (BPB) - there may have been wacky worms before it but this is the first coaster I vividly remember riding, back in 1984 at the tender age of 7!
100. Black Mamba
200. Stealth - chosen specifically because it's roughly 200ft tall.
Now on that note and knowing I'd hit #250 on my trip to Poland, my intention was to make Hyperion my next milestone, again because it's roughly 250ft tall. Unfortunately, being spited by 3 creds at Legendia a few days before meant that I could only get to #249 at Energylandia so I had to abandon that idea, and consequently my next milestone coaster was...
250. Dinocoaster at Zatorland!
Roll on 300...