What a Wookiee! Yeah he's a walking carpet but he's pretty cool with it. As a kid my running order of favourite 'good guys' in Star Wars ran R2-D2, Han Solo and Chewbacca, I was never that bothered about Luke really. Chewie is a pretty straight forward character, he hangs with Han, he's a good pilot, he fixes things and he lets everyone else do the talking. Sure he shouts pretty loudly when stuff isn't to his liking but overall he's pretty chilled.
At the end of A New Hope when they are handing out medals how come Chewbacca doesn't get a medal? I figure that might be what he was having a shout about during the ceremony.