I am an Excel junkie...but I've avoided using a spreadsheet to track my shaving. It just seems so un-Zen-like...I want to relax, get in the zone, and enjoy my shaves!
I don't do my tracking in the middle of a shave.
I track after the moment of zen when I'm back in front of a PC. It might be later in the day or evening when I've had a chance to reflect on how the shave turned out, how the aftershave persisted, if I missed a spot, etc. I often make decisions on tomorrow's shave based on how today went.