my favorite classic fangames are the trtf games for being ancient classics that take you back to a time where it was just the early games and seeing what someone dumb but passionate would make. that and Five Nights at Pingas.
favorite fangames made recently are Together Again and The Magic Hour for being NuEntries that actually respect the source material with putting a unique spin on the gameplay and a decent story.
hated piece of shits are the entire Five Nights at Chuck's saga. 1 is complete dogshit, 2 is still dogshit but by a tiny bit less, 3 is boring shit, and Midway breaks on the 3rd night w/ an instakilling puppet. no wonder the creator real womaned out later.