My god, it literally looks like he traced over a Joker image from a Batman comic and changed the color scheme! Yikes!You know, with the long narrow chin, the crazed smile, the wild hair - he couldn't possibly be a knock off of some other supervillain could he? Well, not a knock off - an homage. Yeah that's what it is.
I'm still not a comic reader aside from trade paperbacks dealing with characters I like (my Revenge of the Green Goblin is still my prize), so my experience is usually limited to A) The Spider-Man movies, B) The mid-90's animated series, C) Video games, D) Action Figures pertaining to all of the above, and E) Your articles. That being said:
Visually, Venom and Carnage are very appealing. They were at the top of my favorites list when I was a kid for the same reason that The Lizard was number 1 on said list: I liked the way they looked. But I never got into any of their psychologies, couldn't really get a grasp on who the characters were or what they'd do or say in a given situation. And I still feel like they have mostly just the bare-bones of a characterization.
And yet...I love my Carnage action figure, and I'm completely stoked to see Venom on screen this May (and played by Eric Foreman no less! I sooo want to see Venom kick Spidey's butt and then turn around and have his own butt kicked by Kurtwood Smith!).
If I'm ever reccommended a well-written story starring either, I'll snap it up in a heartbeat. To me, Venom and Carnage will be like that cartoon you loved as a kid that, as an adult, you can tell is incredibly stupid and yet you still watch intently and lovingly if you find reruns while channel-surfing someday.
That's my two cents.
Also, J.R., I can't tell from your cryptic message, but will there eventually be a Part 3 proper, or is this the end of the series as it stands?