I like Moss.
I mean, he's no Gin Ichimaru, but he's still a sweet character in my book.
Are you refering to Samurai Champloo? I love that show!
And if that's the
Gin Jin Mugen you mean, I think that's a jerkass character done right. If your going to make a character who does unsympathetic things and is unpleasant to be around you can go one of two ways to make him watchable you can make him a pathetic figure of scorn like George Costanza from Sinfeild, or Zap Branagin from Futurama or you can make him a sick badass like Belkar in Order of the Stick or
Gin Jin Mugen from Samurai Champloo. In the first type, the character is frequently the source of his own anguish (so your sense of justice is appeased) and at times you feel pity for his in-ability to get his act together and become a decent human being. In the other, the character is so cool that you forgive him for occasional dips into sociopathy.
To me Moss fails in both respects, he's not intelligent, talented, brave or intresting enough to be a badass, and he's not pathetic enough to be a jerkass woobie, although he's still pretty pathetic. He just
is. Obnoxious.
Edit: Oops I really meant "Mugen".