In wouldn't call myself an "adrenaline junkie", as the OP puts it, but I definitely have a favourable inclination towards rollercoasters and other similar rides. I'm definitely in agreement with Kagami about the lines though. A few years ago I waited 45 minutes for a 2-minute ride, which is roughly a minute riding for 23 minutes waiting. It's probably even worse in the ultra-popular theme parks like Disneyland, though.