What is your favorite ride to go on at a fair?

The Dodgems: I always tried to drive without being hit but took fiendish glee in dodging an impact in such a way that my "attacker" struck someone else's car, especially if both were trying to ram me from opposite sides.

Or an Edwardian "Gallopers" especially if complete with restored, operational steam centre-engine and original organ (which is incidentally, not a "steam organ", but is electrically-driven from an external generator).

But never alone - haven't even been to a fairground since parting from my girlfriend, who lives close to the site of one annual fair. Last time we went, we sampled a version of a mirror maze whose internal walls and that facing out onto the street (so people out there you could see you) were sheets of clear glass. It was a weird, slightly un-nerving experience because in the dim lighting you can't really tell by sight alone, which is glass and which is air! 

We also once visited Wookey Hole, where having left the show-cave itself the path takes you into a paper-mill building holding a fairground collection that includes (or did then anyway) a full mirror-maze. You feel like one of the particles in a kaleidoscope in there, and it's very disorientating, and quite unsettling.

Never had the nerve to try the fast machines like the Waltzers or the high ones like the Big Wheel (Ferris Wheel in USA) and switch-back type rides.

"Rollercoaster" ... if it's a big enough fair.