Honestly the tattoo just seems like some kind of ironic hipster statement now that he’s actually a demon.
Memories, they seem to show up so quick but they leave you far too soon - SN: SX
Kodaline - High Hopes
"We didn’t feel an absolute need for Walt to expire at the end of the show. Our gut told us it was right. As the writers and I worked through all these different possibilities, it felt right, but I don’t think it was a necessity for us. There was a version we kicked around where Walt is the only one who survives, and he’s standing among the wreckage and his whole family is destroyed. That would be a very powerful ending but very much a kick-in-the-teeth kind of ending for the viewers. We talked about a version where Jesse kills Walt. We talked about a version where Walt more or less gets away with it. There’s no right or wrong way to do this job — it’s just a matter of: You get as many smart people around you as possible in the writers room, and I was very lucky to have that. And when our gut told us we had it, we wrote it, and I guess our gut told us that it would feel satisfying for Walt to at least begin to make amends for his life and for all the sadness and misery wrought upon his family and his friends. Walt is never going to redeem himself. He’s just too far down the road to damnation. But at least he takes a few steps along that path." (Vince Gilligan, on Breaking Bad finale, “Felina”)