"cool" used to describe a person

Question

I was reading the about me page on an author of a poker strategy website and on one of the passages he describes himself as a pretty cool guy:

This is the page where you get to read a little more about me and subsequently find out that the guy behind such a sophisticated Texas Hold em website is actually really cool.

I looked up the meaning of cool and it seems like when it's used to describe a person, its meaning is negative. From OALD cool used with persons means:

1. not friendly, interested or enthusiastic
2. calm and confident in a way that lacks respect for other people, but makes people admire you as well as disapprove

So what does he mean when he describes himself as "cool"?

Answer 1

He means definition 3. from Oxford Advanced American Dictionary. Specifically, see their second example.

3 (informal) used to show that you admire or approve of something or someone because they are fashionable, attractive, and often different

• You look pretty cool with that new haircut.
• Dave's a really cool guy.
• It's a cool movie.

When applied to people (e.g. "pretty cool guy"), I would say it is more likely to mean interesting and different than fashionable and attractive.

Answer 2

The problem is that "cool" is slang and I think he means 2. but without the "lack respect" part.