USNS ships are usually pretty solid...Mt Baker used to give egg sandwiches that had BOTH sausage and bacon on them. Amazing.
The AUS FFGs I used to hit in the NAG also had good box lunches, got crab cakes once, lasagna another time. All were good and came in nice foil containers with utensils that didn't cave in on your lap.
The Singaporean LPD would give boxes of street noodles with little shrimp in them. I loved them and a lot of the AWs hated them which meant I got seconds.
The Brits tried really hard. Their box lunches came in a legit box and looked like someone's Mum had made them. A sandwich, a drink, some fruit, some crisps, and some candy. The only downside was that the sandwich and crisps were British...shredded onion and cheese sandwich with ketchup crisps? It wasn't bad, just different/British, and you could tell it was made with care.
Compare all the above to the bread on bread sandwich that the USS THATCH gave us or the ubiquitous paper plates of peas and water with no utensils that most US ships like to give out.