Strong and normal 3D for me all the way!
I think Tron should be put in the normal 3d range. While I admit watching it at home recently, the 3d felt a little subtler to me at home than it did when I saw it in the theaters at Imax 3d and real d 3d formats. I hope I didn't get a bad copy lol.
It could just be that I just need to let it soak in rather than constantly making sure I'm seeing 3d. I tried doing it while watching part of it during of the recent watches I mentioned and it seemed much more 3d I think in some ways.
I'd have to say though that Clash of the Titans is my 3d guilty pleasure. While you can tell that the conversion still needs more work, I really appreciate it still for what they were able to pull off. There's a shot during the Medusa scene where Perseus and the Djin are hanging over the edge and just as the shot cuts and shows Perseus start to swing and try to lift his friend to safety is a perfect and dazzling sense of 3d for me. Feels like you are looking precariously over into the abyss. Amazing stuff!:

Alot of the Kraken stuff is good too.