If it weren't societal norm to eat larger meals at regular times, that is how I would eat. No kidding, I am a snacker. I don't like big meals. I prefer to snack. Or small meals, at the most. For me, I think it's because my blood sugar drops easily if I don't eat more often. So I am more accustomed to eating between meals as it is. And then I am not hungry to eat a full meal when everyone else is. Its just easier for me to always have some kind of little snack on me, and just eat it when I feel like I am hungry.
I also have a history of restriction, bingeing, and purging. So, the snacking type of eating is easier for me to handle in relation to that, as well. The smaller the meal, the easier it is to justify, and the less likely I am to want to purge.