My brother takes the spreadsheet one step further - he lists his current gear with weight, and then the next option with weight and cost, with a final column showing cost per oz saved, that way he can maximize his dollars each year.
I like my comfort, so I am not an ultraligher by any stretch of the imagination. On my two longer trips this year, my total weight at trailhead, including food and water, was 33 lb for a six day trip with a scout troop from Onion Valley to Whitney, and 39 lb for what was planned as an eight day loop from Roads End over Cirque Crest. The only real difference between the two trips was the amount of food I took, and I took too much food on the second trip.
I bring a full coverage tent (Marmot EOS 1P) and full insulated air mattress (Insulmat). Other items:
Pack - Osprey Atmos 65
Stove/Pot - Snow Peak Giga/smaller pot from Brunton IB set
Canister - Bearikade Weekender
Bag - Western Mountaineering Summerlite
I carry a good first aid kit and a well-stocked repair kit, this is derived from the fact that I frequently go with scouts and I need to be prepared to take care of them. I only bring one set of spare clothes, one wool shirt, and one rain shell. And to say that I am interested in knives is an huge understatement, so I am never deficient in that department. I always bring a fixed blade (a very light one that I had a custom maker here in Visalia make for me) as well as a couple light folders and a Leatherman Squirt. Over the last seven years, I have purchased one major item of gear each year to reduce my weight, and in the process have dropped 20 lb from my total pack weight. And my decision to stop carrying a .45 has helped, too. It was just a lot of weight (don't worry, I'm legal, I have a permit).