Even as enemies, they don't resonate with me like human(-oid) villains, the undead, fiends, dragons, abominations, snake-men....hmmm, pretty much any kind of foe beats out the fey with me, I guess. However, if the Feywild is worked well into the default setting and we get some decent adventures and campaigns for it, I might give the fey a spin. I'm hoping that they give them a more interesting default society and behavior. I've seen occasional adventures with scary fey in 2e and 3e, but can't say I thought much of them, either. If they give them a good niche in the cosmology, I may add them to my next homebrew. If not, it's not like it will be any different than any previous edition of D&D for me.