I'd say yes. The Marvel Star Wars comics have a lot to offer. They bring new perspectives to the franchise and the illustrations are top-notch. But, as with any comic, some people might have different tastes.
No, Star Wars Marvel comics are not considered canon. Canon refers to the official and accepted storyline within the Star Wars universe, and these comics often exist outside of that framework.
Definitely not. Star Lord has his own specific storyline and power set in the comics that don't classify him as a Celestial. His adventures and role in the comic universe are separate from the Celestial beings.
Yes, Star-Lord is funny in the comics. His personality and the way he interacts with other characters often result in hilarious moments. His humor helps lighten the mood in otherwise intense situations.