What did Jonny admire about dally

Johnny admires Dally's ability to swear well,

He took a drag on his cigarette and cussed it goodnaturedly for not being a cool. Johnny listened in admiration. "You sure can cuss good, Dally."

He also admires Dally's heroic sense of adventure and bravado,

I bet they were cool ol' guys," he said, his eyes glowing, after I had read the part about them riding into sure death because they were gallant. "They remind me of Dally."