Imho 2GB for apps is more than enough, most apps are below 1 MB.
Moreover, most of the apps you install when you first get a brand new phone (like Olof just did) are apps you never use anyway... You have to spend a little time with a phone to know which apps you'll use and which not, or else your phone ends up being filled up with useless stuff. It's happened to me before. I always find myself deleting apps not only because they take up storage space, but because they're utterly useless.