I have such mixed feelings on graffiti in general.

What I admire is that someone is leaving us a sometimes very complex message, in most cases via image. Sometimes in words. To me, it is not usually beautiful. But it was important enough to them to get the paint and spend some time realizing their vision. That is the part I love.
And then other times, I just like their character or design.

I had something of an epiphany while traveling in Nicaragua in 2008. At first I was frustrated and even angry that all the beautiful historic buildings I had come to see were crudely tagged. Then I realized how subjective and self-centered my indignation was, and just ran with it, taking my pictures graffiti and all.