I mean to go from1984: He beat the hell out of the bad guys and he even mange to kick the Shredder.
2012: He has become such an irritating little pervert, he's unlikable as a character, he pretty much wanted to sacrifice or ditch Irma, even before we knew that she really was. His whole painting his face and wearing a painted masker over it... is just dumb.
What a downfall for this character
One of the best Casey Jones pictures that I've ever seen.
Casey Jones is of course somewhat liked, but not as much as some people would like to believe. All you have to do is look at some of the latest drawings here and at Youtube to see what most people are saying (bashing) about him. The reason behind all of this is from the 2003 and 2012 writers and developers, they didn't do his character any favors and he won't be able too recover from all this dumb kid and teenage hate he has now, not for a long time. Maybe in a decade or two he will be able too... but that's a big maybe.