Just saw Pacific Rim tonight. I'm going to repeat some of what I wrote in another post and then add some new thoughts as well.
I really liked it, except Charlie Day is the movie's JarJar Binks. Another film that compromised itself by feeling obligated for whatever reason to shoehorn in 40 or so minutes of "comic relief." I realise at its heart it is a mechzilla movie and so it can't be too serious, but his cartoonish antics (and to a lesser extent Ron Perlman's) repeatedly took me out of it. All that crap should have been cut.
If you want comic relief in a dramatic movie, make it flow out of organic moments with characters who could be real. Don't force it by relying on the overracting of some cornball sitcom star. And definitely don't keep following his boring-ass "relatable everyman" story in the middle of a film about giant robots fighting monsters. I don't know why so many action films do this (Michael Bay's films are particularly notorious for shoehorned comic relief), but it just brings the movies down.
So I didn't care for that whole dumb part of it.
But I loved Maiko, Idris "Stringer Bell" Elba, the Aussies, the Mech-Kaiju fights and the complete eye-popping effects (and this was on my laptop without 3D). I don't know why people are bringing up MoS (god you guys will fight about anything), but the movie it reminded me of most was Cloverfield. I like to think that was an early Kaiju (even though it wasn't on the Pacific seaboard... can't we pretend?).
Still enjoyed the film, but Day's whole dumb subplot probably brings it down from an 8 to a 7 for me.