I go maybe 6 times a year or something. Usually with the kids, or with my friends if it's a girly movie that SO doesn't want to see. I go with SO maybe once a year or something, we usually wait until it's out on DVD and then rent it.
I did get a shock the other day though, I took DD to see Alice in Wonderland, it's the first 3D movie I've been to, and the tickets were $23 each. And no child discount because it was 3D. I'll be seeing 2D movies from now on I think
It wasn't even at the Imax - just regular 3D