Garfield was a great Spider-Man.
In fact to address
@blommen 's and
@Andrew 's /
@Jack Brickman 's points, I think Garfield was a better Spider-Man than Bale was at being Batman. In fact, he was as close to perfect at being Peter Parker / Spider-Man that I think any actor could reasonably be.
Makes no sense to replace him, at all,
unless they feel he's too young to play an adult Parker (Parker who was a bit older, engaged/married, etc). If that's the direction they want to go, I'm fine with it.
But regarding Batman, I never liked Bale's rendition of Batman. I thought it was forced. His voice was simply, annoying; almost
laughable. He did a good job as Wayne, but as Batman?? Nah... Those movies were good not because of Bale as Batman, but because of Nolan being this generations Kubrick. And Dark Knight was what it was because of the supporting cast, not necessarily because of Bale.
I also don't think Begins or TDKR were all that great. I prefer Amazing Spider-Man 1 to Begins. AS2 was an abomination.
Lastly, I'll say that I prefer DC's approach to the Batman / Superman franchises than I do of Marvel's with Ironman / Avengers. Nolan and Snyder's movies, I think, are just better all around action films than anything Marvel has produced so far, and I'm a huge Marvel fan.
Those Avengers movies, are frankly boring CGI fests. Same goes for Ironman. Just, boring... lots of CGI. Age of Ultron looks to be the same thing. Too much imaginary CGI - like I'm watching Toy Story or something.
/rant