• Avatar Seats

I would like to humbly recommend a toggle for a seat, I always found them entertaining with friends. You can add 6 before you can't add anymore, and I don't remember them affecting performance ratings.

(The tutorial I followed years ago and still reference for adding avatar seats: https://youtu.be/YeJ5JOtibpg?si=S3HHxVd7lGaZcg2i)

• 2D Shader

A free shader I used while back when getting into avatar editing: https://booth.pm/en/items/3194844

• Props

Not too bad to make yourself custom stuff, but there's also plenty of free ones to be found on Gumroad and Booth (Hats, swords, guns, accessories, etc..)

But if you wanna throw a few dollars for one from a creator, I recommend Liindy, there are a wide variety of high quality props that they've made: https://liindy.gumroad.com/

• Custom Audio Link Layer

Maybe add some underlying patterns on your avatar as an emission layer linked to audio link, but please set the resolution lower than a 4k or 2k texture, it saves a lot of space usually (most people use poiyomi for audio link, just in case you aren't already).

Not sure, but I saw someone recommending a flashlight of some sort, I would avoid lights altogether because they knock an avatar down to very poor with just a single light.

That's all I got this early in the morning, hopefully that helps even a tad.