Rock was always my fav as well. Followed up by the Haunted Tank. My early years for comics consisted primarily of three types of books, Richie Rich, Uncle Scrooge, and DC war. Superheroes were of only superficial interest to me in those days, but they became much more interesting to me in my teens.
I still remember my dad taking me to a comic book show in New Britain, CT, back in the late 70's and the only comics I wanted were war books. I remember buying OAAW 176, 242, Weird War 7 (I think) and SSWS 159.
Another of my earliest books was that Weird War book where the two soldiers are fighting and the giant head comes out of the ground.
I met John Severin at a show a few years ago and I told him how I basically grew up reading that stuff and he asked if I turned out okay as a result. I always thought (and still do think) that DC's war line was some of the best comics ever produced.