ok, so my first list wasn't a great list and I have come to make a new 'un!
so without further questions, lets jump in.
(note: this is in no perticular order apart from 3-1)
10: Maximum Carnage
so this story is about Carnage and some other villains such as doppelganger rampaging through New York. Spider-man is helped by Venom, Captain America and Deadpools ally Cable. They of course stop Carnage and that is that but Carnage sometimes teams up with his Maximum Carnage buds until all of them, apart from carnage, die.
(if anyone could tell me how doppelganger dies in the comments below.)
9: The alien costume
This 'black suit story' started off in The Amazing Spider-man #252 but it wasn't until secret wars no.8, where we learnt where it came from. This suit, of course turned Spidey nasty and (in the movies) perverted. This costume found its way to Eddie Brock, who hated Peter Parker and the costume hated Spider-man so (surprise, surprise) they teamed up to become VENOM!!!
8. The kid who collects Spider-man
This story is as sad as it is good. Spider-man visits a boy claiming to be Webheads no 1 fan. this goes on for a bit and Spider-man takes off his mask. The killer though is that it turns out the kid has lukemia and has weeks left to live. when i read it i was close to tears....