Here was me thinking I was going to be original by saying "the next prog".
My best prog, though, would have to be the first one I read - because it got me hook, line and sinker:

A Bolland cover, advertising the classically dystopian "New Year is Cancelled" in
Judge Dredd. Then
The V.C.s, with art by the art god striding the Earth that is Cam Kennedy.
The Stainless Steel Rat (Ezquerra), some
Blackhawk madness (Massimo Belardinelli) and finally an introduction to the editor with
What Tharg Did on Sunday.
I've told the story before, but we were at a party and some other kid wanted to steal my first prog - there ensued a tug of war and it got ripped in half (in a wonderful metaphorical display of the negative results of conflict and greed).