I went and saw the movie again this morning, in 2D this time and without the French subtitles ("Autobots allons-y!").

I enjoyed it on a second viewing which I didn't with ROTF, so points there.

Noticed many things I hadn't the first time which is always nice. Like: "Sidearm Sideswipe" near the end,the Spacebridge pylons the first time we see Sentinel in the opening, the three times the big armed Decepticon is seen, Que's vehicle mode, Soundwave's speakers in robot mode, the G1 theme song, Brawn in NEST HQ, how Carly's taunting of Megatron comes because she saw Sentinel Prime beating Megatron down earlier on the tower.

The tilting building does work better in 3D. In 2D it felt like it went on a bit too long. And there's a few shots in the car chase that are a bit better in 3D, but overall I don't think the 3D is an essential element of the film.

I reckon I'll see it again (in 2D) at the cinema before it's run is done.