The ratio of good remakes to trash remakes is nowhere near where it should be, but the Fight Night remake was actually pretty decent. It doesn't hurt that this version of Charley was played by the guy who played "Charlie Bartlett" either. Or if you haven't seen that (you should), Chekov in the last Star Trek.
Also, Colin Farrell's version of a vampire is extremely sinister. His performance in this movie almost makes up for the garbage that was Daredevil and Alexander. It lost pretty much all of the "comedy" aspects from the original, and seems now more like a vampire version of Disturbia. I think both movies are still very good in their own right, but the newer version is actually easier to watch today, and it also doesn't just feel like a generic cash grab.