Most of my favorite ponies and those with nice hair are on the top of my shelving unit in my bedroom. They must have fun day jobs... Haha. I mostly focus on G1, have hardly touched my G3 in years. I think I tore apart families by selling a lot of them. I used to have every white pony I could find, especially the babies. My sister and I each had our own world, but the ponies would meet 'at the border' to interact. I had the world of M, she had the world of L, as per our initials.
I made families around my baby ponies:
-Seashell is Baby Tiddleywinks' mom. Tiddleywinks is super easy going, which is a huge help for Seashell's back problems. (That's why she's always sitting unlike the rest.)
-Majesty and Glory are Baby Rattles' moms, since they're all white unicorns and look adorable together.
-Beachball is Baby Starflower's mom because they both have slightly frizzy hair and are darker colors than the rest that I have. I was around 11 when I got them and decided they were basically the token black family, in contrast with all the white ponies I had.
-Baby Cuddles is the daughter of Scrumptious and Chief. They're all white, and the symbols make sense. Hose + Watermelon = watering a garden.
Roles in society:
-Princess Tiffany is the the monarch, but until she becomes queen by (marri)age, she has no real power. Just as in England, though, the citizens love their queen.
-Firefly is the military leader, partially inspired by G4 canon, and partially because she was one of my first 2 G1 ponies.
-Cherry Treat, the other of my first 2, is her best friend and trusted advisor. Ever since Midnight Castle, she has had to encourage Firefly not to steal children to fight.
-The Applejack family is all sorts of fun. Since I have G1, G3, and a plush G4 of her, she has the ability to hop dimensions/time. Big Mac wonders when she sometimes disappears for a long time, but never asks, as he's the understanding big brother who doesn't mind running the farm while his hard working sister must be doing something important.
-Ivy, one of a very small population of G2, is the valley girl big sister to the McDonald's Ivy, who is a boy. All they do is argue, and Skyskimmer *coughFluttershy*cough* often shyly gets involved or changes the subject.
-G3 babies Honolu-loo and Pink Sunsparkle (who I nicknamed Ember since she was the first baby pony I saw and so named her after the first baby I saw in G1) are the baby princesses of their regions, Paradise Island and Ponyville respectively, with no real power. (Also I got rid of Paradise Island and want to get rid of the G3 castle as well.)
-Sunlight was called Rainbow Dash until we actually found a name guide. She recently moved to the world of M and has regained her rightful name. She is much more like G3 RD than G4 RD. For lack of a fashion designer in the G1 part of the M world, and possibly G3 since I got rid of my G3 boutique and owner if I recall, Sunlight and my big plush Starshine work as a team.
-Waterfire, the prettiest G3 as far as I'm concerned, is an elemental goddess. She keeps Discord at bay, but her powers are useless when he transforms into the humanoid Q.
-Dr. Whooves helps ponies travel between the generational realms of time and space.
-All food is produced by Cherry Treat, G1 repro/G3 Cotton Candy, G1 repro/G3 Minty, Apple family, and Scrumptious. The population is probably so small because everyone has too much sugar.
-Shining Armor is still busy trying to figure out why his princess is black. (Mystery boxes make no sense.)
-Melody badly wants an autograph from Cheese Sandwich, but they will likely never meet as he's still in his box and belongs to my boyfriend, hopefully to be signed by Weird Al someday.
For all other business needs, the MLP communities have trade agreements with the Littlest Petshop and the sci-fi action figures. Spock and Master Chief have been known to need pony steeds from time to time.
Sometimes, Discord/Q gets a little out of hand... (I couldn't find G3 Fluttershy when I took this.)
This was a fun exercise! I wish I could remember more from when I was a kid. I know that there was only 1 male that I had for awhile so he became the stud, and that a dude had to get married if he had at least 5 children because males were rare but someone had to help raise such a big family.