Warwick: The marauder skin would be awesome if...
He had any sort of interesting animations to back it up. He doesn't have a run animation (despite one of his abilities ONLY being passive run speed) his aa's are extremely short, his Q doesn't even follow through with a physical animation despite the fact it easily could, and his R, my god his R, I thought it was fine but with the extended length of the arms on this skin the amount of ridiculous body torsion reminds me only of the action figures that can spin all the way around, just random fast flailing.
I love this guy but he's got so much room for improvement. His attack speed skill not giving any passive benefit, and his run skill being 100% passive (except for the tactics behind revealing yourself) I just cant think of another champ with this much room for any sort of flavor.
All that said, give him a loping animation in blood thirst run mode and I'll easily forget about this again.