I've been on every type so here is my breakdown:
Favorite Diver- SheiKra by default. But I've really felt I would always enjoy SheiKra more than Griffon and the other competitors. SheiKra has that killer flat turn after the Immelmann. I love the second drop into the underground portion. It's just the little differences that end up making a big difference for me. But who knows, I haven't been on Griffon yet. But riding SheiKra marks a really important transition in my roller coaster riding career, too, so there's also a lot of personal essence that SheiKra will always have over the others.
Favorite Mega- Raging Bull by default. I know there are other Megas that I will probably like better, like Diamondback or Shambhala, but I loooooove Raging Bull until the day I get to ride those ones
Favorite Invert- Chinese Fireball. This is a really hard toss-up between Montu, Hungarian Horntail, and Chinese Fireball. They are all sooo fun and each has a one-of-a-kind element not on any other invert (Horntail has the awesome first overbank, Fireball has the wrap-around Immelmann, Montu has the pretzel loop) but Fireball's wrap-around Immelmann is a hands down winner. That helix is insane. And Fireball has a floater air-hill that actually has good air, which I just verified last week. So, Fireball.
Favorite Stand Up- Mantis was better than Iron Wolf, so...
Favorite Sit Down- Incredible Hulk outweighs Kumba in my opinion. I like the launch into the zero-g, and the Hulk is just non-stop insanity. Taller inversions too. It's just a more substantial ride in almost every way.
Favorite Floorless- Kraken by default but god damn poop piss do I love Kraken.
Favorite Winger- X-Flight by default, and it's fun. Definitely not the best though. GateDamnfuck is probably the best.
Favorite Flyer- Manta is amazing. Better than SUF. Manta has a corkscrew and flying airtime out of the MCBR in the back row, which is a bizarre sensation.
Favorite Overall- SheiKra. If I had to pick one of these^ B&Ms to ride every day for the rest of my life, it would be SheiKra. The airtime, the grace, and forces. I know it's short but it's a heavenly ride.