When do they become actual humans and not just eat-sleep-poop machines?

I know this is kind of a dumb question lol but seriously asking. My son is 2 months old and I love him to death but I can't really interact with him yet? Like he doesn't do anything. I read to him, I talk to him, and he just stares or cries. My wife says I should just enjoy this phase but I'm kinda waiting for the moment where he actually does something.

What age did you guys start to feel like your kid had a personality and you could like, actually play together?