I agree, I got lucky with Monsters vs Aliens, but Coraline was almost all 3D so I had to really hunt for a regular theatre that first weekend...

I've had photosensitive seizures in the past so 3D also gives me a headache at the least and makes me want to vomit at the worst and even a couple of scenes of regular Coraline gave me a headache.

At the very least they should be understanding under the Americans with Disabilities act...it's bad enough that I have to keep sunglasses on me at all times because I never know when a film will have a sequence with strobe lighting or flashing.