How nerdy is it to create art from your own DNA? Pretty nerdy, I'd say, which is why I wanted to know more. I can't say that my fascination has increased after seeing the artwork gallery (they're all pretty much the same; if you've seen one gel electrophoresis plate you've seen 'em all) but it is a neat idea.
I think framed fingerprints are a better choice because more people actually know and appreciate that fingerprints are unique. Of course DNA is too but all those pictures look the same and you'd be constantly explaining that the strange assortment of glowing organized rectangles actually represent your DNA, of all things. Then the person would give you a strange look that says, "you're so weird" and change the subject and then you'd feel not only like the nerd you are but slightly naked, too, because LOOK your DNA is right there hanging out on the wall in all it's glory for everyone to gawk at.
I'd definitely go the fingerprint route, unless I was uncommonly proud of my genetics.