My favorite thing about Cowboy Bebop is how motley of a crew they all are and the interaction between characters. The action is ok but nothing special. But character development is where this anime really excels. They pretty much go into everyone's backstory well enough to give you a good idea of what makes them tick.
Can move along a bit slow at times but for the most part has a good mixture of comedy, action; seriousness and sillyness.