Okay, so via some completely unscientific testing I've got my two cents to add to this issue.
So, out of my friends, I'm one of the only ones who uses a skin that's 64x64, two of them use ones that are 64x32. It seems that whenever I approached them using a custom skin with a size of 64x64 that I would either swich to one of theirs or they would switch to mine. This also happens to another friend who uses a 64x64 skin, but i'm not sure of the exact pattern with his as he's not been on to test it. One thing to note is that when I downsized my skin down to 64x32 and approached the friends who were using the 64x32 skins it didn't switch in any way unlike when I used a 64x64 skin, where I'd always switch when I got in the vicinity of them. This makes me think that perhaps the skin switching and the usage of 64x64 skins are related in some way.
I don't know if this is the case for other people though.
19/2 edit: It also happened using a 64x32 skin now, although this is the first time it's happened
SONOFCAVEMAN
Okay, so via some completely unscientific testing I've got my two cents to add to this issue.
So, out of my friends, I'm one of the only ones who uses a skin that's 64x64, two of them use ones that are 64x32. It seems that whenever I approached them using a custom skin with a size of 64x64 that I would either swich to one of theirs or they would switch to mine. This also happens to another friend who uses a 64x64 skin, but i'm not sure of the exact pattern with his as he's not been on to test it. One thing to note is that when I downsized my skin down to 64x32 and approached the friends who were using the 64x32 skins it didn't switch in any way unlike when I used a 64x64 skin, where I'd always switch when I got in the vicinity of them. This makes me think that perhaps the skin switching and the usage of 64x64 skins are related in some way.
I don't know if this is the case for other people though.
19/2 edit: It also happened using a 64x32 skin now, although this is the first time it's happened