Well i am just going to say....

YOU USE A MOUSE? ><

I never use it really, use the keyboard, its a bit confusing, but after you got it down, its superior and faster than the keyboard. Not that hard to learn after the initial thing, but the mouse is generally never needed.

Keyboard>Mouse

I had my mouse broken once, i use the keyboard only and i missed absolutely nothing besides the POL log out options. The game was still the same. Mouse is not needed.