The only things adults are restricted from are play areas with a posted maximum height, paying childrens prices at AYCTE restaurant, wearing costumes except for Halloween parties though you can do bounding, and buying kids meals at some sit downs that are not owned/operated by Disney. You can ride whatever you want, buy kids meals at most locations, meet characters, ask cast members with stickers for a few, and whatever else you want that at other places may be considered something for kids only. That’s the fun of Disney is you don’t have to skip things because you aren’t a kid. Adults need to have fun too.