Yes, personalities can change with different writers and I do prefer Quicksilver being a "man-child" as opposed to being "emo". It just makes him more endearing to me. I think that's why ATJ's version was not as popular, unfortunately. It does feel weird seeing the twins apart though. I actually liked Pietro more than Wanda in AoU. She was just too "evil" for me. He seemed less so? I do agree that ATJ needed more screen time for him to build up his character and popularity, but you know...Studio politics.