Can I ask why? Genuinely curious.
I've liked him a lot ever since he was introduced, and the way he was introduced.
-Unsullied did not have a leader, and Dany told the soldiers to choose a leader amongst themselves. It seems almost unanimously that Greyworm was chosen.
-Even though he has been castrated, it seems like there are still traces of his...sexuality? Still present, at least in his mind. I think it will be interesting to see where they go with this.
-He is undoubtedly loyal to whom he serves, but it doesn't come off as one-dimensional about it to me. When he learns of Ser Barristan's death (his ally, but not someone he serves) he feels remorse. And then, he feels remorse for not being able to save his own men. So he has a conscience in all this warfare.
-He dropped the "I am a soldier, not a politician line" in either season 5 or 6, reminds me a little of Shepard from Mass Effect but more importantly, that time of the season 5/6 just shows how he ain't about bullshit, and is aware that politics can be a whole load of that sometimes, and he tells Tyrion as much.
-Lastly, I know Westeros is based on Medieval England or whatever, but it's cool that they were able to add a black/brown character who has been a supporting character for so long. He may not be a
main character but he is a character relevant enough to be around the main characters.