Question

How does ponyboy feel about fighting ? How do the other greasers feel about it

Answer 1

In the book, it states that the other greasers each have their own reasons for fighting. Either for fun or as an outlet. Ponyboy doesn't seem to enjoy the violence but he doesn't shy away from it. He doesn't take pride or joy from it, while the other greasers do. 

Answer 2

Ponyboy does not have a good reason to fight. Therefore he goes to each of the greasers to ask them their individual reasons for fighting in the rumble. In the end, Ponyboy can only think of one reason for fighting and that is self-defense.