For most of us, I think this is a life-long search. I find, as I talk to people, that there is amazing variety in what people find enjoyable--and eating should be enjoyable, even at altitude.
One thing not mentioned much, are the freeze-dried backpacker foods. On my last 13-day trip, some years ago, this was my staple. Bought the ones that sounded good---absolutely inedible on the trail. I ended up with no dinner for three nites, until we got into trout country, and I could borrow some tackle. I'm sure the fish saved my life.
I also lost 15 lbs, and I was pretty damn tired those days (actually, pretty much ALL the days!)
So, experiment. I still like to go on a trip with things I like, but add one or two things in as extras, but not staples. Over ten hikes, you really get a feel for what works.
BTW, I generally don't take anything that needs heat for any trip of three days or less (outside of winter).
Trader Joes is a treasure trove of possibilities!
