Ghosts that found their guardians very early on having almost as little clue what was going on as they’re guardian, so very old guardians having extremely special bonds with their ghosts since they learnt practically everything together. The inside jokes are endless.On the other side of things the ghosts that are finding the current day guardians knowing everything there is to know from spending countless nights or days where it wasn’t safe to go looking for their guardians studying anything and everything so that they could have whatever there guardian may want or like down pat. Like they’ll know the shops that have the best ratings, the best restaurants in the city, that one random hunter’s birthday that their guardian only met once, how to raise a child, different bands and music, Zavala’s birthday, the date that specific raids were done/areas were captured, how to recite one of Cayde’s fanfics romance books word for word, the best tasting berries found in the EDZ, top 50 teas according to Devrim, really anything.
Ghosts being able to hook up to computers and play video games. Guardians, when first hearing about this, assume that they’re all healers, but in reality, most of them enjoy being a dps or tank because they can’t fulfil those roles out on the field. Some of them started playing tanks or dps because they wanted to know a sliver of what their guardian felt like if they were a hunter or titan. Others wanted to just be able to handle things up front for once.
Ghosts either knowing none of the lore or every last droplet of it. There’s no in between. Ghost groups/parties/fireteams and ghost only guilds/clans.
Guardians/civilians that play the same games that run into the ghosts in the game for the first time assume they would know all of the strats and generally be really good at the game, when in reality they’re just like any other gamer and use the game for an escape from reality where they don’t have to know everything about an enemy.