I hate my sim carrying loads of stuff for all sorts of reasons (I think it creates lag, I hate having to scroll through a load of items to find what I want, there are bugs where the whole inventory disappears when you do certain things and that seems to happens less when they carry less stuff), so I try to keep the bare minimum on my sim:

• Hikon QX40di Gladiator camera
• Collection Helper
• Potent Invigorating Elixirs (means you never need to sleep)
• Vials of Potent Bliss (cures loneliness and stress)
• Wish Enhancing Serums (doubles all wish points, including lifetime wish for 24hr)
• Jars of Potent Friendship (make almost any sim a good friend, except some NPCs like paparazzi)
• Showers in a can (quick clean)
• Pemmican (quick meal + special moodlet)
• Death flower
• Flame fruit (gives positive moodlet)

But I do like to keep things just in case (as you do), so in their house I have different treasure chests for different things like seeds, gems, metals, inventions, relics, etc where I store most things (this allows for keeping much more junk which also potentially creates lag, but then, so do most things in the game lol and this way it isn't cluttering my space), and then my family inventory in buy mode is mostly free gifts my sim gets from being a celebrity, which I used to keep but now mostly sell.

So, does anyone else have these kinds of systems, or do other people generally not give it much thought at all? 😂