I recently wired a small woodworking shop. Prices being what they are, it was cheapest to put in a 42 space panel for 10 or 15 circuits. I spread everything out in the panel by groups - 240 all together, main floor 120 outlets, loft 120 outlets, lights all have their own sections with a few spaces between them. Makes it real easy for the owner to find what he is lookng for. He wanted no hassles so I did a 100 amp service for a 16x20 shop. The inspector made a comment about how many outlets there were.