One of the coolest things I got to do when I was in product development was watch cartoons. I was developing a line of Loony Tunes characters so a few times a week I'd wheel a TV into my office and watch Loony Tunes in search of poses for characters. I used to love passing the purchasing department and rub it in my saying, "Time to get to work."
Gossamer, although he was only in a few shorts, has always been a favorite of mine. Not because he had the best performances, but just because of his looks. Kind of like when you see a big nerdy fat guy that thinks he's tough and he's wearing a fanny pack and a shirt that says, "Looks Like Trouble" or "Heaven Don't Want Me And Hell's Afraid I'll Take Over". You just have to laugh (after pointing).
My other top Warner Brothers cartoon picks are Bugs, Daffy and Foghorn Leghorn.
My least favorite is Taz . It's not the actual character I hate, it's all of the douchebags that wear the Taz shirts, put the stickers on their trucks, etc. because they see themselves as having Tazmanian Devil traits. Real original.