Tobey Maguire or Jake Gyllenhaal
I don't know about other, but I HATED Tobey Maguire as Peter Parker/Spider-man. He's such a emotionless lump. I mean fine Tobey can do drama, I'll give him that much I guess, but he has no RANGE. Spider-man is a energetic, wise-cracking character. After hearing about the troubles starting Spider-man 2 and dismissal of Tobey and the possible attachment of Jake Gyllenhaal to the picture I was stoked. Alot of people say he's just like Tobey, including looks, but he's shown a wide variety of emotions in his films from Donnie Darko to Bubble Boy . I think he would have been a better chose from the beginning. Also he's Kirsten Dunst's boyfriend so there's obviously chemistry there that would have been on the screen. That's just my opinion, I could be wrong.
Note: I stole the last line from Dennis Miller