When I first looked into kegging, I was going to do just one or two taps. Finally decided to just suck it up and go big with room to grow. Started with 5, I'm adding another in a week or so, then adding the 7th this summer for a hard limeade/lemonade/whatever.
Tap 1: English Dark Mild Tap 2: American Brown Tap 3: American Amber Tap 4: Sour Belgian Brown Tap 5: Nitro Milk Stout
Kegged: Amber, Brown, Milk Stout
Lagering: Vienna Lager