My son (7) has Asperger's Syndrome and loves to go to Disney, but won't ride most of the rides. He loves BTM, but I think it's only because it is a train!! He is obsessed with roller coasters (how they're made and all the dimentions of them) but will not ride them. At home, he spends most of his time watching shows about how they're built or looking at the ride videos on different theme park websites. We tried to get him on EE, but he chickened out just as he ws lifting his foot off the ground to get in!!! So we joke that he rides the benches with my sis while I ride the rides with my neice!!
When we go to WDW, we spend ALOT of time on the monorail, WDW Railroad, and Spaceship Earth -- which is fine with me -- it's all about making him happy!!!