The list is hard for me. One has height, speed, and tunnels. The others have tons of airtime. For the record I like floater over ejector air. This is how the gigas, hypers, and megas are ranked on my total coaster list for now:
1. Millennium Force
2. Apollo's Chariot
3. Goliath (SFOG)
6. Nitro
9. Steel Force
13. Son of Beast (yes, I like it that much; does a wooden count?)
18. Superman Ride of Steel (SFA)
27. Phantom's Revenge
28. Titan (SFOT)
39. Magnum XL200
(Of course, when I go to KI again this year and Carowinds and KD next year, this will change.)