Not much on looks, hygiene or good health habits in general, but he was inarguably a brilliant songwriter.
The Pogues is one of my favorite Celtic rock bands. Not only did they produce a lot of great songs but also what is arguably the best contemporary secular Christmas song ever ("Fairytale of New York"), which has been covered about a thousand times by other rock performers.
The below is not only my favorite Pogues song (written by Shane) but one of my favorite songs overall.