Flavor - love the idea of total food weight for calculation rather than X amount of meat + X amount of sides.
I will add - when catering we do not use the 8oz side as a calculation. That is only for serving at our joint. Catering portion depends (right now) mostly on number of sides requested. As side choice increases, portion size generally falls.
Though you do have to watch out for the vegetarians. A couple of them will kill a 1/2 tray of mac faster than a hot knife through butter.
Cha Cha Hut BBQ : 43311 Route 28 (corner of Route 28 & County Road 38: Arkville, NY : [URL="http://chachahut.com"]chachahut.com[/URL]
Backwoods Pro Jr.
busted Backwoods Fatboy
Weber 22.5 Kettle
some stainless wood fired thing