I met a ton of nice people in VRChat. A lot of times, they follow me after a while of not seeing them and I get a little bit confused because they no longer use the avatar I met them with and I can't exactly recall who they are (until they go back to that avatar). I'm really bad when it comes to remembering names, specially when I don't hang out often with that person.
For this reason, I think it would be a good idea to be able to go to someone's profile and have a space to write down notes about that user. I'm sure I'm not the only one who would benefit from that.