I've heard Jeff Atwood, Joel Spolsky, and many other legendary people talk about how the ASP.Net Web Forms model sucks. (So this question is kind of directed to them, hopefully Jeff is reading)

Now, I highly respect their opinion, given their background and expertise, but truth be told, I absolutely LOVE ASP.Net. I think the model is brilliant, and it sucks if you have no idea what you're doing, but once you understand how to control ViewState, when to use handlers instead of pages, etc, it is generations ahead of all the other models.

So every time I hear someone complain about how it sucks, I can't help ask the same question...
Why? What is it that's so bad about it?

I appreciate all opinions. I'm assuming there's probably a post at Jeff's blog talking about this too...