Patlabor the movie: great story, interesting characters, granted the action is a tad sparce, but considering they're well placed in the structure of the film and are nicely choreographed it doesn't matter, and the mecha in it are about as 'realistic' as you can get. Also, zero fanservice, which is undoubtebly a plus.
ditto all these points for its sequel
Gun X Sword: compelling revenge story, set in the future on another planet with a slight western vibe to it, and plenty of giant robots
gundam 00: this one is a bit of a mixed bag, the story is alright, but seeing as its gundam, it will not be particulary subtle about....anything, also season 2 takes a hit story wise in favour of more impressive battle scenes due to a bigger budget.
ditto all these points for its sequel
Gun X Sword: compelling revenge story, set in the future on another planet with a slight western vibe to it, and plenty of giant robots
gundam 00: this one is a bit of a mixed bag, the story is alright, but seeing as its gundam, it will not be particulary subtle about....anything, also season 2 takes a hit story wise in favour of more impressive battle scenes due to a bigger budget.