My choices as follows!!! 1st:::: G. I. T. S. the Major rules!!!! 2nd:::: The Matrix, Neo is going to woop some AcE!!!! 3rd:::: Serial Experiments: Lain, wow!!! I thought I was the only one that has watched this one....I need to again actually, it's been a while.....and Boogiepop Phantom too . . . . . Unfortunately Tron does make my list... Though when I eventually watch the new one, it might, maybe...we'll see.
That's a tough poll but I had to go with Tron just for the fact that it was first in my head when I watched it back when so everything after has been 'after' Tron. That being said, I loved all the others as well and each has expanded, in some way, on what Tron is to me.