User blog comment:Blackendedsoul/Smoker's Bravery/@comment-4681125-20120319171327/@comment-3425840-20120319171802

Ace was worth 550 million, it is a confirmed spoiler that is gonna become official tomorrow.

Well, over confidence is something of the personality. People can have it with or without Logia fruits. But it seems like most Logia tend to become over confident because of their apparent vulnerability. But there are exceptions to it. See Crocodile, he was cocky but that he still understood his weaknesses. The admirals are very efficient not over confident.