I would change Claymore's ending first and foremost. Claire when through all that training, travelling and pain for revenge, and didn't even get to kill the psycho bastard that finished off Teresa with a cheap shot. Claire almost lost her mind multiple times and pushed herself to the limit, and she still didn't kill her. Garbage~!
I totally forgot about FLCL! (Keep your minds right) Everything was at the peak of excitement, and then it all ends because Naota had to kiss her. Then she just...leaves him, and everything goes back to normal? Weak. --_--
there are alot of endings that I would have wished to changed it according to my preference first off I would have wanted to change the ending of
it lacks more episode to thoroughly understand about the enemy
I think everyone knows why
I cant think of more at this time perhaps soon when I recall those animes with horrible endings
oh yeah Berserk too...