I have four taps, with enough room in my keezer for 10 kegs (I store bottled beer and, in the summer time, Gatorade and bottled water in it as well).
I supposed, ideally, that I should add just one more tap and be happy with it. I'm making the move to 10-gallon batches in the very near future, so a double brew day will net me 20 gallons.
I brew 14 different beers. Some I like, others I don't. Some I brew solely for other people (my Dad LOVES my blonde ale, for example). So my tap lineup would look something like this:
Blonde, Pale, Red, Brown, Porter
However... I would very much like a 6th tap for "special" or "seasonal" beers. People around here go all apey for pumpkin ales in the fall... maybe have a stout for St. Paddy's. Maybe an IPA for summertime... my Yule ale always goes over well.
However, due to scheduling conflicts and a host of other issues, we don't have nearly as many people over as we used to. Our last party was SWMBO's b-day party back in August. 5 people showed up (we invited 30). I did a ton of brewing leading up to the party to ensure that I had a wonderful sample of homebrew on tap. Granted, now, we get to drink it all, but I do love sharing my homebrew with others. Their loss.
Anyway..
So.. no clue.