Hi Alexandra!
It sounds like you're a fan of thrill rides, like me! I just can't get enough of the
attractions with all the twists, turns, and thrills. Hands up in the air, or it doesn't count!
From my experience, while Cast Members will typically not ask you
specifically to remove your sunglasses, they
will ask you to secure loose articles. If sunglasses, hats, mouse ears, or any other loose articles were to fly off during a ride, it could injure another guest. (I had the brim of a ball cap hit me right between the eyes on an attraction recently, and it's not pleasant, I can attest to that.) Guests who lose a personal item on an attraction also don't have the option to retrieve it if this happens.
Since most of the queue lines will take you indoors before stepping onto the ride, I've usually removed my sunglasses prior to reaching the ride vehicles. It's up to you if you feel like you'll need your sunglasses on the outdoor parts of the coasters. I have light eyes that are very sensitive to sunlight, but I can usually make it through the length of a rollercoaster at Walt Disney World without needing the sun protection. (But the moment it's over, they're going back on my face!) Every coaster has at least one or two stretches that will take you into the dark, and if I were to have sunglasses on, I'd miss some of the best parts! (For example, the Yeti's lair on
Expedition Everest - Legend of the Forbidden Mountain or the cool caves on
Big Thunder Mountain Railroad.)
If you feel like you'll really need those sunnies, a good idea would to attach a sunglass strap to keep them in place during a fast-moving outdoor ride.
I hope this helps, and you'll soon be zooming through some twists and turns on a Walt Disney World Resort vacation!
Diane W.