They are more like B&M's Speed Trains. They make you feel like you are hovering above the track, but you never really think about the trains during the coaster.
Medusa (SFDK) is still one of my favorite coasters.
When it comes to possitive G's (When you get pushed into the seat. Goliath is the man.
When it's the airtime, I must say Silver Star (Europa Park) Or G-Force (Holiday Park) are very tied.