There is no reason to reboot. You cant compare Spider-Man 3 to Batman and Robin,not even Forever. Reboots are there for 2 reasons.
1) Get rid of the crap.
2) Change of scenery. Like The Punisher.
Spider-Man doesnt qualify for a reboot. Ive lived with these movies for nearly 8 years. I would be upset if they got rebooted. I dont care if Tobey is a wimp,hes tough for the best of times. I dont care about Kirsten not doing MJ justice (who really cares for that) or being hot enough. They have made the characters human and people that you care for and connect with. The thing that made Spidey popular...being able to relate to him. In 2,his crappy luck I can relate too that most times,we all can.
I love the movies for many reasons and dont want them to change,unless they MUST.