I don't think forcefulness is the only aspect that makes the ride good, but it can make it better. I hear people say that the more recent B&M coasters are "boring," but I honestly don't see how a ride filled with twists, turns, inversions, etc. is boring just because it doesn't have extreme forces like the older models do. I actually find that if a coaster is extremely forceful, it can make the ride experience worse and less enjoyable, but that's just me.