I've never seen any career as badly-handled as Vin Diesel's. No exaggeration...I think The Pacifier is the first nail in the coffin of what could have been a brilliant career. Vin Diesel's breakout performance in Pitch Black set the stage for a new antihero - tough as nails with a face carved in stone, muscles Schwarzenegger wishes he still had, and a voice like gravel, Diesel looked like a freight train that couldn't be stopped. Then came XXX. And Chronicles of Riddick. And the last straw, The Pacifier. Diesel should have ignored the people telling him this was Kindergarten Cop. It's Stop or My Mom Will Shoot, a role that humiliates him.
Message to Vin Diesel: You are not cute, you are not endearing, you are not funny. You are scary. You are a complete and total hardcase, a guy who looks like he could chew up nails and spit out bullets. Doing a kid's movie worked for Arnold because he had already built up a reputation, and could allow the public to see another side of him. The world doesn't know who you are, and Pacifier just confuses them even more.
If I were Diesel's agent, I would throw out all the scripts he has except for the one that casts Diesel as the villain. I would have him play nothing but villains for the next two or three years, and maybe never play a hero again. That's where he will shine. Either that or stop working out, lose the muscles, re-invent yourself, and start playing sensitive heroes. Otherwise, Vin Diesel will end up in the same boat as Jean-Claude Van Damme and Steven Seagal, doing straight-to-video B-grade action movies. What a waste.