Uuuumm? Anything is fine as long as Chanyeol is the uke, but my personal favorite is Krisyeol. 

I'm just another fangirl, writing stories for my own amusement and those who enjoys it. I'm in no way searching for personal gains here beside spreading Krisyeol and uke Chanyeol/ bottom Chanyeol story.

I don't have a really good grammar, so please excuse me if I make grammatical errors.