I do not enjoy passive 3d either. It may have something to do with an eye problem i have. I have a lazy eye, and if something is between me and an image(something on my windshield, or my glasses for instance) i see 2 images. So, when i put on passive glasses, it is INCREDIBLY hard for me to get my eyes to only see 1 image to see the 3d.
I do not have this issue with active 3d at all. Literally the first 3d movie i ever saw in my life was in my home a month ago. Im still 100% blown away by active 3d.