Someone sent me an email about two years ago asking me what the first comic I ever read was. I don't think I ever replied.
It's a bit late, (and I don't even remember who asked), but I'm going to attempt a vague answer today!
I say vague, because the truth is, I can't actually remember what the first comic I read was. It was probably an old Whizzer and Chips annual. One of my mum's workmates used to give them to me after her son had finished reading them. I also read a lot of a comic called Jackpot, which was in the same sort of vein as W & C, and had a strip in it called Laser Eraser about a lad who could zap stuff onto a spaceship with a pointy thing which he'd nicked off some aliens. That's all I remember. Of course there was The Beano and Buster and The Dandy, Whoopee and WOW! I read all of those at some point.
Proper big boy comics wise, I suppose it would have been Look-In or 2000AD - I was certainly reading both of those before I discovered American comics. I think the guy emailing me meant American comics though and, again, the honest answer is I don't remember my first. I do recall the first comic that made a nasty impact on my innocent mind though...
Ah, House of Mystery #304. I would've been 10 when I picked this up from the newsagent. Great Mike Kaluta cover, eh? I know it made an impact on me, because I vividly remember being shit scared by one of the stories inside. It doesn't seem very frightening to my jaded 38-year-old self of course, but as a kid? Yeah it was poo-your-pants grim.
So, here you are imaginary chums, not the first comic I read, but the first comic which I remember reading (all scans can be clicked to ramp up the spookiness)...