I'm a huge Carpenter fan, I have been since watching The Thing when it came out... which is, by far, the best re-make of a film, ever.
My least favorite is Vampires.
I won't go into serious commentary on the films, since people have already said a ton about the movies and I agree with some of the posts.
I think Carpenter was one of the first (if not the first) independent writer/producer/director whose movie broke box-office records the theaters, and in 1978 dollars, no less.
And I think it's because of this reason (along with him being talented) that he will always be able to get a film made. Ghosts of Mars had a pretty high budget of $28 million... while Escape from LA had, five years earlier, a $50 million dollar budget.
Both films did terrible at the box office.
I trust Carpenter as a director, but I think the choices in scripts is what is making these last few films so not on par with his earlier work. I think the same thing can be said about Schwarzenegger... I'm just making a comparison here between the two, because their choices of scripts (End of Days and The 6th Day for Arnold) were not good choices.
His films until Memoirs have all been relatively low budget, and though they never made as much money as Halloween, they all were successful in their own rights. Till this day the films do well in rentals and sales, so they continue to make money.
I thought 1995 was a great year, because Carpenter filmed both Village of the Damned and In the Mouth of Madness at the same time... crazy guy. I enjoyed both of them.
It's funny, but his films haven't made money since, yet every since Halloween addition to the franchise (for which he gets a check) makes money.
I got to see an early screening of Ghosts of Mars, which I enjoyed, and learned that when he makes a deal to shoot a film, he makes sure to have no test audiences view the work, so the studios don't have the opportunity to make their own cut of the film. Pretty neat.
I wrote some reviews of his work, if you're interested. Keep in mind, they're just my reviews, I'm not trying to be pretentious or anything.
The Fog
Assault on Precinct Thirteen
Christine
In the Mouth of Madness
Ghosts of Mars
Anyway, hope you enjoy them if you read them.