I agree with you about the 3D SeaWolf, and the reason is because it's a live action film (well, ok with masses of CGI, but you get the idea). I've never had a problem watching animated films in 3D because with those everything is in focus, both in the foreground and background, so you can choose what to focus on. In live action films, for artistic direction there's usually something in focus while others are out of focus (perfect example is the bit with the floating droplet at the start of the film). To me this defeats the point of having 3D because you have to look at / focus on what they want you to, otherwise to try and focus on something that is out of focus, and it gives you a headache.