More metal bands need to do this! Metallica, Slayer and now Devildriver have 'ugly' Christmas sweaters, and I think it's an epic idea. Completely appropriate to wear to a family festive gathering, and yet still awesome. Plus, it's a lazy and yet appropriate option for that holiday dress-up idea that many people seem to partake in. I'd probably occasionally wear one everywhere else during the winter too.
(While I don't have many nice things to say about deathcore/metalcore, a band called Attila, falling into the aforementioned subgenre, has a somewhat offensive ugly Christmas sweater. It might be worth looking it up if you're bored).
I actually particularly like this Devildriver one, even though Devildriver is not in the very top of my most listened-to bands category. Plus, the scarf and Christmas ornament are a nice addition.
A bit more on the Devildriver Christmas bundle here:
http://www.blabbermouth.net/news/devildriver-ugly-christmas-sweater-coming-next-month/