I'm going to play without pictures as I suck at drawing and you didn't want this to become a show me your shop thread.
1: Workbench without legs. Makes it easy to sweep up and cleanup. Benches are mounted to the wall. I do have a building table in the middle of my shop but all other benches are mounted to the walls. The one exception is the single bench where my mill and lathe are. I have extra legs to help support the weight and keep things level.
2: Dust filteration system. Don't have it yet but I will have one very soon.
3: Electrical outlets on the front edge of your bench. Keeps the power cords out of the way and if you space them every four feet on your bench, you will always be within easy reach of power.
4: Small Fridge. Keeps the CA fresh but more importantly it keeps my Shiner Bock nice and frosty.
5: Sanding Table. I use to have a table with a peg board top and would hookup my shop vac while sanding. It was a great way to keep the dust down in my shop.
6: Shelves and sealed storage bins for all your bits and pieces. Keeps things organized and all the balsa dust out.
7: A dedicated hangar space for all completed planes that doesn't intrude on your building area. Having to shuffle things around constantly while building is a real PITA.
8: A spare folding table to lay all your kit parts and pieces on while building. Makes for more pleasant building and the table can be folded up and stored out of the way when not in use.
Oh Heck, heres some pics to give you an idea I'm talking about. Also found the origianl layout for the shop.
Bench with legs for machine tools.
Workbench with outlets on front edge and you can see these are built and supported soley by the angle brackets which makes it easy to sweep up without a bunch of vertical bench legs in the way.