For me, I've always been a fan of a ride with a sense of danger. The most obvious way to gain that is to be on a ride that conveys a sense of speed (manufacturers don't need to make me go fast, they just need to make me feel like I'm going fast). Further to the idea of "danger", I never understood the appeal of a smooth ride (except when the smoothness helps maintain speed). I've just always tended to enjoy slightly more rickety rides than smooth ones, because there's an added dimension of fear that comes into play. That's not to say I don't appreciate comfort, in terms of restrains, etc.. I'm a very large man (I've eaten myself out of riding most coasters nowadays, which is why I was drawn to the TPR youtube channel POVs in the first place), but when I was a slightly less large man, I definitely appreciated those rides that could accommodate me.
Truthfully, I could have fun on just about any coaster/ride someone would put in front of me, as long as I was with the right people and I didn't feel like the ride was being throttled down in any way (there's no worse feeling than feeling like manufacturers/ride operators aren't pushing a ride to give you all that it's capable of giving).