I've always been predominately keyboard as well. What I do use my mouse for (sometimes) is menu navigation. but even then, I swap between using the scroll on my mouse and arrow and page up/down keys. Even stranger is that while I am left handed, I constantly swap between mouse use with my left and right hand while playing.
Edited, Aug 2nd 2016 12:48pm by RenatusofTitan
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Renatus (Titan)
"We are Dragoons, and to make short work of foppish cavalry is our bread and butter."
-Bob Shaftoe, The System of the World