if we have to choose which traits we want to discuss. I am going to list some that could be home brewed into 5.0 fairly easily from 3.5. Most of the 'arche-type feats' could be offered to players as a choice of feat for lvl 1, as they only effect how NPCs treat you in the get go. These could be enough to create an illusion of choice without causing someone to panic.
Not going to lie, I actually really enjoyed having those minor character-creation perks that you could take at first level, in 3.5 - little things that give very minor benefits, but a wealth of character flavour and rp potential that even a video game can hook into.
They can be little things like +1 benefits to a couple of specific things, or moderately situational advantages paired with mirror disadvantages, but more importantly for a video game, it would be a flag about your character that the game now has and can use for rp and flavour; it's an excellent tool in that regard, and I'd love to see more of it.
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As a little clarifier, for information purposes: Technically, there are no such thing as "Skill Checks" in 5e - there are ability checks, and they are written by reference to the ability score that controls them, and if appropriate, a specific skill that assists - so "Wisdom (Perception)" or "Charisma (Intimidation)". Sometimes an ability check doesn't have an associated skill, which is where it is simply written with the ability score, so "Strength check" or "Dexterity check". If you are rolling a d20 and adding the modifier from one of your ability scores (but it isn't an attack roll or a saving throw), then it is an ability check and anything that affects ability checks, affects this. This means that
rolling for initiatve (it is a dexterity check), or rolling to attempt a high level
counterspell or
dispel magic (ability checks using your spellcasting ability score) are also ability checks, and they are also affected by things like luckstones, or for example, Jack of all trades - since they are ability checks that you are not proficient with.
