My kids all enjoy a salad wrap, one kid likes to take baked beans for lunch, so when we get low on salad stuff there's a small tin of beans in the pantry to go in the lunch bag None of them are satisfied with a simple cheese sandwich...and I hate sandwiches, so it's probably my fault
I do make school snacks - mainly because buying them ends up costing a bomb, so I just find it easier to do a bake off, the kids help, in an hour and half we've got a month's worth of school snacks, then the next month we make completely different things so they don't get sick of eating the same thing over and over. I have had to make a deal with my kids, though...that a few times a year they can be like the rest of the kids and have 'packet food.'
It makes mornings easy. Wraps get made the night before, then the morning of they put the wrap in their bag, grab what they want for fruit break (one will take the time to cut up a fruit salad, the others usually grab whatever...apple, mini cucumber, carrot, or snow peas etc. and throw that in the bag), and then they grab a snack for recess out of the freezer, put an ice brick in and they're done. If we haven't got baked goods in the freezer it's a pain in the morning as they don't know what to take and search the fridge and pantry three times trying to decide...so spending that 1 1/2hrs makes life easy.
I am also a 'do a big cook up and dinners are sorted for the fortnight' type of person, too. It just works for us, because we're always rushing off to something during the week.