Here's a few...
Nike Cage is about a hundred years old. That dyed hair ain't foolin' anyone. If you look at the IMDB entry, Matt Long is credited as playing "Young Johnny Blaze." Anyone see the problem with that? There shouldn't be a "young" Johnny Blaze because he should just be young. Johnny is supposed to be a tortured, lonely, bad ass biker. Not some decripid old man (that's the job of the Phantom Rider or "Caretaker" in this film). Shoot, Cage should've been cast as the Phantom Rider.

Alright, age aside, let's say Cage is perfect as Johnny. Fine. Why is Ghost Rider such a jokester in this movie? Cage delivers these Schwarzenegger-esque one liners with a grin smeared across his face, as if his body were not being consumed by Hell fire. WHY? Since when is Ghost Rider a freakin' comedian?
The movie looks painfully cheap too, like the Fantastic Four. Which just adds to my annoyance. It could've been low budget but stylized, like any of Guillermo Del Toro's or Robert Rodriguez's movies. Instead, everything is brightly lit and the camera angles are trite and simplistic.
Was anyone even trying to make this movie good during production? It seems Cage isn't even attempting to act and the actor they chose for Black Heart looks like a total douche bag.
And OH MY GOD, what's up with them playing "Bad to the Bone" by George Thorogood & the Destroyers during the newest trailers?! WHY?!?! It's beyond a joke now, it's complete and utter farce. I can only hope and pray they remake it, a la Ang Lee's The Hulk (which was a fabulous movie and didn't need to be remade).
Will I watch it? Yes. Not sure when, but I must see how utterly terrible it will be.