Because the tasteless masses drove him out of the Bond role in order to give it to that untalented pretty boy, and he was never considered a bankable actor afterwards.
But I will see Hot Fuzz just for him.
Err, what? He was the one who chose not to do GoldenEye...he was contracted for three films but asked to be let out of his contract.
I know this. But he had to have been influenced by the poor reception of both his films, both by fans and critics. And it wouldnt surprise me in the least if by the time GE rolled around, after 6 years, Cubby Broccoli would *suggest* Dalton bow out.
To people like me, Dalton is a fantastic actor and easily one of the better Bonds. But that is the view of the extreme minority. Most casuals will see him as the "bad Bond", and most film studios would see him as a risk, not an asset.