K-Drama to recommend to my male friend

Hello. 

I once tried to make him watch Kill me Heal me but he gave up after 7 episodes because he was disturbed by the amount of pink glows on screen. He is okay with a romantic backstory but it was too cheesy for him.

I would like to try to make him watch one once again, so naturally I though about my two favourites: W Two Worlds or The King Eternal Monarch. Which one of those 2 should I recommend to him?

Other dramas, I have watched and though to recommend to him are these ones: Black, Chicago Typewriter, Kill It, Memories of the Alhambra, SPY. Feel free to tell me if one of these is better suited for a male friend.  

If you have any other recommandations. I'm open to them. 

Thank you. 

Rather than assume the presence  of a y-chromosome determines Drama preferences, why not ask him what sort of series he likes? I do  have a Y-chromosome, and you quite literally couldn't pay me to watch ANY of the Dramas mentioned in this thread so far, except Kill Me Heal Me, which I didn't mind, thanks to Ji Seong's stellar performances. Every other Drama named so far I either dropped or actively avoided. 

Your friend may prefer Dramas with more action, like My Beautiful Bride, or thrillers and mystery dramas, but the one thing I can say with 100% certainty is that simply being male says nothing about what sort of Dramas anyone will like.

Vagabond

Itaewon Class

The World Of The Married

Sky Castle

Save Me

Prison Playbook