I have a lot of pfps I use, so I will break them down from each category.
All-Time Favorite: This is the first-ever pfp I have had on steam. It is just a small doodle but it means a lot to me since a lot of old friends have seen me with this for years. This PFP goes all the way back to 2018-2017 and is also where I got the side-name, "Angel". The Picture explains it quite easily. Along with that, many people can easily recognize me with this pfp and is how many people got used to seeing me. This has always been a favorite to me and I will always keep it.
Oneshot pfps: Ever since I fell in love with oneshot, I also have been getting into changing my pfp to characters from it (yes I am obsessed). There are a ton I switch to so let me just put down some favorites. The ones listed were probably the ones I used most in-game or ones I like a lot.
Most Used pfp so far: These pictures are what I use in-game and on discord the most. I really like them since I edited them (all credit of drawing these goes to atsuover, She is amazing <3) and since they are by my favorite animator and the drawings are just super cute all together.