What fruit choices are there to be on your starting island?
after you pick your map, is everything else randomly generated and you have to re-set to get things that may be more ideal?
we've been shown apples, cherries, oranges, peaches, and pears which have always been native fruit types in previous games. there could be more added, but it's neither been confirmed nor denied so we all just assume it's only apples, cherries, oranges, peaches, and pears.
the airport colors, grass shape, native fruit, and villagers are all randomly generated after you've picked your map. if you wanted a specific type of these things you would have to reset to get it.
if you don't get your favorite fruit as your native fruit you can still plant it on your island. native fruit only really matters for perfect fruit, but we don't know if that's in this game. perfect fruit was introduced in animal crossing new leaf and you can only plant your native fruit as a perfect fruit. for example, if your native fruit is oranges you can only plant the orange perfect fruit. trying to plant a different perfect fruit wouldn't work out and the tree would die as a sapling.
villagers don't matter as much to reset for, especially since it seems we are limited to only getting one villager of the Uchi personality and one of the Jock personality. For each gender of animals (lady and dude) there are four personality types. Ladies have Uchi, Snooty, Normal, and Peppy while dudes have Jock, Lazy, Cranky, and Smug. villagers will randomly move in and out so if you don't have one you like at the start they can leave. (if you have a villager you want to keep if they ask to move out just say no. they don't always just up and leave on you but can).
grass shape is permanent and cannot be changed. there are only 3 types and each have a winter/snow varient (in winter your grass changes to snow). the circle grass shape changes to hexagons during winter, the square grass shape stays square during winter, and the triangle grass shape changes to stars during winter.
your airport is how you arrive at your island, and is how you send postcards to villagers and visit other people's islands. if i'm remembering correctly, there have only been 4 variations shown which are yellow, green, orange, and blue. it hasn't been confirmed nor denied if you can change the color yourself, and if there are more options other than those four.
edit: the tree, rock, and flower placement is all random as well. all generated maps are also randomized, so i guess literally everything is randomized. when you choose your map you can only seen how the island is itself, so like the beach and where rocks are placed on it, cliffs and how they're shaped, rivers and how they're shaped/where the end, and where the resident services is (resident services is basically your town hall and where you sell/buy things early game). when choosing the map only, i'd focus on where your rivers end at on the beach because those may not be something you can change later on.
i hope this helped, sorry it's a long post!! just wanted to help you out MiniPocketWorld <3
