I haven't ever had an eating disorder. I just don't have a huge appetite and if I don't eat, I stop feeling hungry.
The things I find hard are:
Certain foods: bread and mashed potato are the worst-I think this was because dp were convinced that those foods were majorly important, so we had that at every meal except breakfast.
I didn't like them, but was still expected to eat them. If it had varied into rice/pasta/chips etc. then I suspect I'd be fine. Now I can't eat mashed potato ever and bread only in certain conditions.
Eating when I feel expected to finish. I hate being invited round for a meal. Don't mind eating out though. But eating at my ILs I find a nightmare. Because they all have huge appetites, so I get given too much then sneery comments if I don't finish. Even though dh usually stops them saying anything now, and often takes some of my portion, I feel the pressure. Often I will not eat there, and just make it look like I am.
Too much: Big portion just sends me into panic. I know I won't finish, so I can't start.
Drink: Sounds silly, but I can't eat certain things with a drink, but I need a drink at the end. And with certain foods I need something with more to it than just water/squash. Fizzy usually will do.
Snacking: I actually function better on snacking. But I can eat a whole meal as snacks, just a bit at a time. I can start with cheese on toast, half an hour later have a cake, and an hour after that have fruit. All snacks, but together an okay meal.
Certain things together: I tend to eat things separately. Not entirely, but I'll often eat (eg) all the meat, then the roast potatoes, then the veg (separately) in a meal. Don't comment, or I feel I can't then I struggle to eat.
Not too soon after waking: I don't have breakfast and can't eat within about 2hours of waking. Makes me feel very sick. If (rarely) I sleep during the day, the same thing is true.
Things like stress stop me eating, a small illness can have me off my food for weeks. I have to force myself to eat in this sort of situation.