Doug,
I share your views on 3D and regard it as a marketing-driven distraction. However, we did see How to Train Your Dragon in 3D and it was super. Great perspectives and the effects were not overused. HTTYD was designed as a 3D movie from the start and it shows.
I saw Avatar and Alice in Wonderland as well in 3D and was less than impressed. Our seats were down low for the latter and that probably ruined a lot of the effect as well. It would be interesting to see a 3D movie review where the reviewer evaluates the effects from the fringes of the seating area.
Anyway, there is at least one really well-done 3D movie out there!
Cheers,
John M.