My main is Lloyd in his flight jacket, but I'd really like the pigeon. Unfortunately I missed out on that because I think he was exclusive to the beta (I didn't even know the game existed until a few months ago, so I missed all that). I did like the Christmas outfits a lot though and played with Nemo and Macchiato in those outfits.
I've also got Cowboy Nemo, and like that outfit a lot. However, I stopped using it because Nemo's cowboy hat was the cause of many of my own deaths. One time I got punched hard on Beat Up Bridge and his hat flew off. I was thrown off but would've been able to grab the side of the bridge if the hat hadn't got in the way. Instead, I caught hold of the hat and not the bridge and fell to my death. It was a funny moment. I might have it on video somewhere.