I've never gotten into all the hype with the graffiti line and don't think it goes with much, and love the Damier Neverfull, which will go with everything, so this is an easy one for me - Damier Neverfull is my choice. It's a very classy, pretty bag that will still be wonderful 5 years from now. The hot pink neon graffiti - not so much. I think it's very trendy, and I would get very tired of it, but then again - I'm older than you. I imagine you'll get lots of enablers on here saying - get the graffiti, but they don't have to wear it. Does it go with your clothes? Will you be comfortable out and about with friends actually wearing the bag? I try to separate some of the hype on the newer bags with whether or not I'll actually love wearing the bag day in and day out. I do think this is a bag too that is going to be VERY heavily faked, so even if I had a real one, I would worry people was thinking I was carrying a fake.
I guess if I wanted a graffiti bag, I'd pick one of the older ones (you can still get them pretty easily) because the colors (I think) were classier. That said - if you love the bright pink, you're young and slim and can probably pull it off. The ultimate test is really whether you'll get enough use out of it and love wearing it over time. Nothing is truly limited edition anymore with LV.