I have requested a seat during busy and slow times on Space Mountain and was accomidated. It could be the CM and his/her magical-ness. Or it could be the times. we(sister and I) usually ask for the back. Sometimes they are more apt to give you the seat you want when the CM has a new car to fill rather than filling the last spots on the train. Most times on RnRC they have been good. If you pick seats that noone else asks for, the CM's really dont mind. BTM you can sometimes pick your row but sometime are forced into a row. Just go on the rides again and sit where you want if you dont get it the first time, is what I say!!!!!!!!!!!!!11