Well, while I am not a Spidey fan per-se, I
am a comic book geek, so I know more than a little about Spidey comics, and have read them on occasion.
Venom is not one of my favorite Spidey villains. He doesn't even make the list. There's nothing interesting about him. He's merely some guy in a suit that looks like Spidey's old black suit. *shrug*
I think both of the villains in the movies have been great so far. Norman Osborn's crazy split-personality mirror scene was fantastic. The actor did a fantastic job of creating two faces that were so different they felt like separate entities. While the Power Rangers mask was silly, I didn't mind it too much. It wasn't the mask that made the character, it was the actor.
DocOc was just as good. I liked the fact that he wasn't really a villain per se. He was sympathetic and interesting, and his tentacles' AI acting as a sort of "serpent in the garden of eden" was a neat touch. DocOc also had his bit of silliness. If the only thing between me and being taken over by an AI were a "control chip"...you can bet I'd have ten of those babies welded into the harness, and they'd be a lot more solid than a little plastic thingamajig at the base of my skull.

But the rest of the character...and movie...was good enough for me to overlook that little bit of silliness, just like the Goblin's Mask.
I'm a bit worried that 2 villains could spoil the next Spidey movie, but the first two have been so good (the best comic book movies every made, IMO,) that I have to give Sam the benefit of the doubt. He's earned it.