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When deciding on Deeps vs Mediums think weight. Mediums when full with honey will come in around 40-60 pounds for a 10 framed super. If you work in Deeps, you are looking at upwards around 90 pounds when full.
I like mediums because they are easier to move. Some beeks will mix size of boxes (deeps for brood and med or shallow for honey). I don't because this way I have more flexibility with my equipment. All medium means I can pull any box and stick in what ever combo of frames are needed. I also work with nucs that I keep in all mediums.