Thoughts on 1st POV fanfics?

Many books are written from the first person point of view, but I noticed not that many fanfictions are written that way. I guess writing the character as if you are them might be challenging in some way?

I’ve only ever written one 1st person POV fic, and it made me cringe a bit. (Surprisingly it’s my most famous fic:’)) So I don’t think I’d do that again.

Do you write them? Like to read them? Any other opinions and thoughts in this?