Despite many years of CAD use, I'm still not an ace at the keyboard (I usually have to peek)...so I found a lot of quick routes to CAD functions via the mouse that many never bothered to look for. As for the keyboard, I always would set up aliases in CAD that would be easier to type (first one to go was "DI" for distance...change to "DD", second was match properties - "MM", then "CO" for copy was changed to "C" and circle became "CC", etc etc etc).
I just can't hop around on the keyboard very efficiently like many people can, so any command that was more than two keys apart got fixed. Same for Revit, though there isn't as much flexibility in Revit shortcuts as there is for ACAD. Fortunately there isn't so much trimming and filleting and all that junk in Revit, so it isn't so much of a hassle.