I'll credit Terminator, Aliens and The Abyss as good movies. The rest were nothing to write home about. Cameron can be a good little workhorse on his day, but he has trotted out some pretty mediocre stuff.
Paying top dollar for a bunch of CGI in a movie with a plot which hugs the safe wall of Hollywood clichés isn't really groundbreaking stuff. It certainly brings nothing new to cinema. And if you still have to wear 3D glasses to watch it, what exactly is "revolutionary" about the technology?
Show me another action director who has produced films with such solid scripts (don't forget he writes his own stuff), with such solid characters, all backed up with such stunning production standards?
As regards your second paragraph are we talking about the same man? You're suggesting Cameron takes the easy route? There's a reason why The Abyss is probably one of the most solid & well produced underwater flicks ever made, and that's because he did it the hard way. And don't forget, this is a man who decided to shoot on location for 'Titanic', with home grown new camera technology. A couple of models in a tank would have been the easy way!
I'm sure some people don't enjoy Cameron's work, which is of course absolutely fine... But at least give the man his due credit for the writing, filming and production skills he has brought to the table over and over again.
When I read your second paragraph I thought you were talking about Michael Bay... Now there's a perfect fit!