Honestly I really liked it at first but after one point it became annoying...

We all have our most & our least favourite characters in a drama here's ny list for this drama:
MFC: Ni Tian Er Xing & Zi Yu
LFC: Bai Cai & Xin Yue Kui

Ni Tian Er Xing & Zi Yu they both were amazing characters and the actors did an excellent job playing them!!
For me these two were the only characters that they deserved to get everything that they wanted but it didn't happen. I was happy for Zi Yu at the end that he lived and watched Wu Geng defeating Hei Long and gaining the freedom for all three realms but in the process he lost the rest of his family and ppl he loved and became a lonely soul. He definitely deserved more happiness.
As for Ni Tiang Er Xing he was an amazing character! A great and caring leader and also a great and loyal friend that deserved to get everything and be happy but instead the twisted writers had him die.

Xin Yue Kui was such a twisted character!
For her greed for power and apparently because of her crush on Hei Long was willing to kill everyone even her own family!
I found the fact that she was killed by Hei Long very entertaining but I definitely wanted her to suffer alot more than she did!

I also liked Hei Long's character because he was really powerful. If he had a good heart he could have been a great leader for the Immortals.

Wu Geng was a good character, but I was disappointed. Although he was strong enough to kill Hei Long at the end all that power wasn't really his, it was borrowed or given to him and without Er Xing's help, giving him his own remaining power after he had died, he would have been dead too. The thing about him was that he had a very strong will power, that's why he managed to cultivate the Qi energy that Zi Yu gave him so fast and became stronger and also managed to activate the colourless realm devine power.
He was also a very good leader and he even managed to bring together the three realms and bring peace amongst them. He is definitely could've been a great leader for the three realms but in the end he gave it all up for nothing, just because he wanted to go find that idiotic and good for nothing Bai Cai.
I still don't understand why she got to live again and not all those other great characters that died. She was so fricking annoying and weak from the beginning till the end. Such an unnecessary and good for nothing character. The only thing ahe did throughout the entire drama was to say "A Gou" like an idiot, and annoy us.
I liked her more when she was evil.
Without her character this drama could've been a 9 or 9,5 easily.
Also she didn't have any chemistry with Wu Geng.
In my opinion, this drama didn't need the romance. It would've worked better as a Friendship and Bromance drama.
If the writers wanted Romance they could have had Wu Geng end up with A Lan or Bei Er, since the ML had way more chemistry with them. But no, yet again, those twisted writers hed them both killed like Er Xing.
Those great ppl that deserved to live and be happy remaind dead and that annoying Bai Cai was brought back from the dead. I'll never forgive the writers for that.
The only good thing that they did (for me) was that they made Shi Xing and Xuan Feng Sage King, good characters. I really like these two actors so it was kinda impossible and difficult for me to see them as evil characters and hate them. I was grateful when they both turned good and didn't remain in the evil side.