I'm afraid of heights, but love riding roller coasters.
Wow, yeah I can relate. Being really high up is terrifying, but at least on a roller coaster it is only for a really short and fast period of time! 
Yeah, I remember going to my first theme park. My friends begged me to get on roller coasters and I wouldn't. I finally did and ended up liking it. 
Haha, yeah that is great! I am glad you enjoyed the thrill of riding one :)