I'd separate different curries with the rice at the start because I like to taste each one on their own (especially if I'm trying a new recipe). After that, it gradually melds together.
I'm not a sequential eater, but one of my kids is - she'll eat all her meat, then all her potatoes, then all her carrots, then all her broccoli, for example. That weirds me out.
And some foods need to be mixed - haggis, tatties & neeps; mince & tatties; gravy & mash - actually gravy & pretty much anything.
I now apologise to all those I've made feel ill