I really REALLY don't understand fics that say something like "REALLY OoC!"
Seriously, isn't the purpose of fan fiction trying to portray the original work in a new light/direction but still keeping the essence of the original characters? I guess I don't mind if some change in characterization comes from plot events. Naruto turns blind and gains a bit more patience? Sure no problem. The characters getting slightly drunk is okay too, as long as they don't do anything so unrealistic (within the realms of being drunk) while they are drunk. Turning Ryoma into a female that spazzes way too much and PMSes over dramatically? No thx. Cloud becoming an overly timid stumbling pile of goo when talking to Sephiroth is not very appealing either, Cloud has a backbone darn it and it should not be surgically removed for no good reason.
So yeah, I tend to flee at these "OoC" signs. It's like molding a cannon character into your own personal OC or self insert and just sticking the name of another character on it. It's like fraud D:<
And a writer really should have more confidence in his/her characterization. Kinda stupid to post a fic where you think the characters are completely different from normal. It's like admitting to the fraud! If you are committing fraud at least be discreet about it! Well, at least it helps me avoid the fic