So far I’ve binged and enjoyed :

1. My Poseidon.

2. Moonshine and Valentine.

3. Destiny’s Love.

But my favourite is “Moonshine and Valentine”. I love it in modern setting with an ML who’s an immortal with at least a human SML.

From what I have watched maybe Goblin or A Korean Odyssey 

I mostly watch Korean Dramas so here are my recs

Goblin : Goblins, reapers, reincarnation ect.

A Korean Odyssey:  many fantasy related characters

Blade Man: Superhero like man with blades

Blood: Vampires

Black Knight: Reincarnation, and internal life

Bring it On Ghost:  Ghosts

Oh my Ghostess: Also ghosts

Come Back Mister: Second chance at life

Secret Garden: Body switching

Surplus Princess: Mermaids

Strong Woman Do Bong Soon: super strength

The Beauty Inside: Changing appearance

The Girl who sees scents: Ability to see traces of different scents

Legend of the Blue Sea: Mermaids

The Master's Sun: Ghosts

Tomorrow with You: Time Travel

W: Jumping between realities

You Who Came from the Stars; Alien

I feel like you'd like Ashes of Love. It's a beautiful romance xianxia about gods and magic kinda like Ten Miles of Peach Blossoms. Both are good if you haven't watched them.

  • Goblin
  • Bring it on ghost
  • Hwayugi
  • You who came from a star
  • Frankestein no koi
  • Bride of the water God
  • Legend of the Blue Sea

Korean:

  • Arang and the Magistrate
  • Oh My Ghostess
  • My Love From Another Star
  • Goblin
  • My Girlfriend is a Gumiho
  • The Master's Sun

Chinese:

  • Ashes of Love
  • Ten Miles of Peach Blossoms
  • Legend of Fu Yao

Dream Knight - 5 guardians born out of the tears of a girl have to face a mermaid dilemma (one of them is madly in love with the female lead and the other 4 are fine with this)