Weird, cause I have yet to bang my head on Vortex and enjoy the ride a lot. I suppose the roughness adds to the ride for me and I just ignore it. Diamondback is a blast to ride but I more enjoy the loops and such as opposed to my stomach feeling funny.
Next year we plan to hit up more parks, so I will be able to experience more rides and such. I'm fairly new at coasters so the variety my better help me understand peoples likes/dislikes better. At the moment, I love them all, lol.