It was nice to hear another person's perspective on him and the Hulk, especially when that person had seen another side of the Hulk that nobody else had. "Don't let him hear you say that, he might not like it too much. I'm puny Banner after all."
"It is unique," Bruce argued. "The Hulk, he doesn't like a lot of people so the fact he liked you is immense. Impressive even." He hurriedly explained as he was aware that his words had been taken the wrong way. "And I didn't mean that I don't like you because I do, like you, that is."
Bruce sighed, frustrated at himself for not being able to articulate himself as well as he could in his mind or about science. "So, yeah, it's a mutual like."