I've never ridden RnR or ToT...Drops bother me. But I pretty much love everything else. It took me a while to get used to Splash Mtn, but on my last trip it really didn't bother me (I sat in the back). We usually skip the teacups too, but just because they are such a basic ride.
A funny thing happened to me a few years ago. I had an alergic reaction to something I ate at Boma. Usually, with these things, I get it out of my system, and about an hour later I feel fine. Most of my family decided to go back to MK after dinner, and I didn't want to waste the night, so I decided to go withthem. I figured the bus ride would give my system time to recover. Well, Walking into the MK I still wasn't quite right, but I figured I could tolerate, oh, It's a Small World. I mean who couldn't tolerate IaSW?
Me - the boat motion nearly made me sick again. So we went further...By the time we got over to Pirates, I felt better again, or so I thought....I nearly lost it again on Pirates - after that, we called it a night.
The next day though, I felt better than ever - very desensitized - and that's when I rode Space Mtn. for the first time! Yippee! Since then, I'm still a whimp, but none of the rides bothers me nearly as much. I even did most of the rides at Universal!

My suggestion to newbie's who are whimps like me, is to wait until late in the day, or maybe even waiting until the second day to hit some of the bigger rides. the first time I rode M:S it was our first ride of the trip, and left me feeling somehwat dizzy. The second time, we rode Test Track first, and just that one ride, made a big difference for me.