People like that he actually had the balls to try and kill Sasuke. Because Sasuke is terrible. Also at least early on people thought he was one of the only people who actually thought like a ninja.
Of course now its been revealed that's he was enormously incompetent and never achieved jack because of it on top of being Stupid Evil but there you go.
Originally posted by Astner
He doesn't have any notable flaws that make him interesting, and his persona is so-so.
I have some flaws for you:
1. He's a pervert. He enjoys Jiraiya's perv books and gets red faces while reading them.
2. He stuck his fingers up a 12-year-old's *sshole (adding to #1).
3. He's late almost to a fault.
4. He is indecisive at times when he should be thoroughly decisive (such as being unwilling to kill Sasuke for the longest time).
5. His chakra seems below average for a Jonin/Kage level character (this may be his biggest character flaw, actually).
I am drawing a blank. Are there others?
Originally posted by psycho gundam
danzou was gangster, and he always rolled with some cool ass people.
Agreed. Danzo was a pretty good ninja.