One of the greatest modeling tools I've come across is the edge extrude tool. I think modeling ability could increase even more if the edge extrude tool were changed. Instead of extruding along the plane of the previous faces, it would be wonderful if you could click and drag like in 3ds max. So you could click, the new edges would appear, and you could drag to where you wanted to place them.
Perhaps it would be better to have a compatibility where you used move rotate or scale with edge extrude as in 3ds max.
Here's what happens in 3ds max:
You shift click with the move tool - the new edges appear and follow the cursor and place the edges in relation to the cursor position.
You shift click with the rotate tool - the new edges appear and are rotated with the mouse
You shift click with the scale tool - the new edges appear and are scaled in respect to the mouse position.
It would be great if this were possible because I find that the edge extrude method of modeling is very useful and simple.