1) Tower of Terror (classic Disney, theming, story-telling and great thrills)
2) Splash Mountain (super-classic Disney story-telling, terrific family ride, very scary for a few seconds for youngin's)
3) a tie between every other attraction.
Just had this discussion with my oldest son (8) on our bus ride home our final night at WDW.
Me
Tower of Terror (a ride I thought I would never do but was talked into by my 8 year old)
Kali River Rapids (I love seeing the reactions of people when they get drenched)
Tie -EE/RRC