Probably just a "teenage-crisis", much like a midlife-crisis. Dude thought people can't actually be nice/genuine and are in essence just "fake" as a friend of mine once said. Parents weren't doing well financially, he had to "share" Jack with another person in Kayla, he wanted to date Jack's sister, probably had a reason to believe Joe was a bit too friendly with him, and found out his "girlfriend" in Jessica was having an incest party with her brother...Kinda a lot to deal with in a few weeks time and he just broke down, went into a hole and came out da new Craig, but even worse. Shit can happen when you repress your feelings, didn't seem like he had a parent child relationship in which he could talk to them about his issues, nor could he, at least in his mind, talk to Jack.
As to what my favorite part of the story has been as of yet...no clue . Each Chapter is quite a bit different, I feel like the Tara Saga dove into a very dark place and came out for all the better, and your writing during that saga was exceptional. The First few chapters were amazing in building the characters while maintaining a fairly fast paced story-line that kept the reader glued to the...screen? However, I feel like YOUR best work in this story has to be the Tara Saga, your writing was exceptional. That doesn't necessarily mean it is my favorite part of the story, that I may have to think on for awhile longer.
As always, keep up the Great work man! Hope you find a good place with the fam.
http://members.adult-fanfiction.org/profile.php?no=1296952247&view=story&zone=inu
I personally like this writers Inuyasha story...I generally don't read "anime" storys but the author has written it exceptionally well. Might not be in the same taste as a lot of other readers, but I like it. Good plot, not even close to being done, has 80 chapters, great character development etc. Oh and the author updates regularly, generally every other day or so.