Hunger and Frequency of Eating are big points of friction when dating someone who doesn't do keto or carnivore.
They are always hungry, I probably was this way before too, but now it's feels like such a huge time sink.
"Let's go to lunch - at the grill!" Great! I love the grill... Literally walking out of the grill "Let's find a snack"... one ice cream later... "Where are we going to have dinner"
I went on a few dates with a vegetarian and they were craving food constantly, even more then the above - every few minutes they had to eat some fruit or something sweet. It was kinda funny until it started to interrupt plans or outings.
I suppose this is just a reflection with how much my relationship with food has changed. Going into markets with a million snack shops seems so out of touch with reality now.