I like amusement parks, but I don't like rides at all. I don't get motion sickness or anything, but I get a strong fight-or-flight response that makes me feel terrible. I know some people enjoy that feeling and/or can overcome it just by knowing logically that they aren't really in danger, but to me it feels exactly the same as if I'm about to die. I hate feeling that way, and have completely panicked on rides before (back when I was young and my dad would force me to go on them). Nothing fun about it.
However, I do like walking around amusement parks and seeing everything, going into the shops, watching the shows, etc. I don't really mind the crowds because there are usually places you can go to get away from them, but sometimes they are overwhelming. There are one or two gentle rides that I don't mind, but I wish they offered a non-rider price because I'd be happy to skip them too if it meant I could pay less.