I think when I first started I was very precious and aware that I could be liked onstage. I cultivated that; I was much sweeter onstage than I needed to be. And I think a lot of comedians try to please the audience when they start.
It's a strange thing to want to be more likable onstage (or offstage for that matter). Trying really hard to be likable is, well, rather unlikable. It seems pandering.
Meanwhile, the guy who doesn't give a shit whether you like him or not comes off as confident. Apathy can be awful sexy.
Sometimes they don't want you to please them. They just want you to be who you are, warts and all. People dig warts.