The coasters over in the UK are pretty lame compared to US standards, but here are my fave ones: -
Oblivion at Alton Towers - I screamed like a little girl on that one 😮
Air at Alton Towers - You are tilted upright so its like you're flying like Superman 😎
The Big One at Blackpool - I've been fairly drunk both times I've been on that one. 🙄