Why does pony say that dally was the one he liked least in their gang?

"Of all of us, Dally was the one I liked least. He didn't have Soda's understanding or dash, or Two-Bit's humor, or even Darry's superman qualities. But I realized that these three appealed to me because they were like the heroes in the novels I read. Dally was real. I liked my books and clouds, and sunsets. Dally was so real he scared me." pg 76