I agree to the extent that it's a little annoying when I want to rotate the model, or rotate or resize the region.
These are the only three of those tools that I use and none of them are the default so always have to click the little down arrow. It's made worse by the fact that I'm usually operating over a VNC viewer which renders my mouse cursor as a tiny dot rather than a pointer, so the precise place to click is even harder to find, but that's a problem for our IT department to figure out!
But it's not so annoying that I've made the effort yet to see if I can assign hotkeys to those tools, which would be a better solution for me anyway.
*edit* oh yeah and the selection tools, I almost always want the freehand tool rather than the rectangle one!