Why did Bambi admire the old stag?

I am unsure about whether or not the question is asking about the Disney film version of this story or the actual text written by Felix Salten. For this particular question, it probably doesn't matter. The film presents the old stag in a way that runs true to the book. Chapter 6 is probably a reader's best place to look for why Bambi admires the old stag. The narrator does a nice job of including a lot of Bambi's thoughts when he first encounters the old stag. We are told that the old stag looked more powerful than the other male deer. The stag also appeared "taller and prouder." Everything about him commands attention from others because of how regal and stately he looks and acts.

His coat shone with a deeper, richer red, but his face silver gray. And tall, black, beaded antlers rose high above his nervous ears.

The old stag's voice even commands obedience. Readers are told that Bambi was "completely dominated by his masterful voice, and at the same time, he admired it." Bambi admires the old stag for the same reasons that the other young deer, other males, and females admire him. He is big, powerful, handsome, and commands attention. He does this as a nobleman would and not how a dictator would, and Bambi admires that.