Re: Too painful for a chick?
Keep her off the two wood coasters, especially Mean Streak. They are rickedy and rough, most people enjoy that, clearly your girlfriend does not.
Maverick is really smooth, except for the 2nd Stengel dive where there is a moment where you might snap your neck a little. However if you keep your head straight (no bending to any side) you should be good.
Corkscrew has some head banging, wouldnt take her on that either.
Mantis is more of a problem for us men then women due to some anatomical differences, I really think you would be ok there.
As for general things, if she isnt a big fan of forces, stay towards the front on any coaster, its always more forceful (and "rough") in the back.