I actually rather enjoyed the third one, especially at how Marty became The Man Without A Name by the end of the film. I was a little disappointed that not a lot was done with Marty and his family like had been done in the first two, but I guess they took it as far is it could have gone. In any case, considering it was the third act of a trilogy, it did a much better job then a lot of other film series had done at the point.