Many people say coaster enthuisits aren't normal to begin with. I just say us "Coaster Junkies" are in it for the fun and the thrill of a new day. We're no different than somebody who goes to Egypt to explor the ruins.
Coaster Junkie from NH I drive in & out of Boston, so I ride coasters to relax!
^Its really not that hard to explain, humans enjoy overloading their senses, balence is no different then taste (eating good food,) sound (listening to music,) sight (art) and touch (wont go there ;).) The only problem is that in order to as a science prof once stated to me "derive pleasure from our vestibular system" we have to build multi million machines, or pay a whole lot more then a art museum ticket, CD, etc to ride someone elses (ie the parks.)