Seems like we have a similar approach to painting. If landscapes are your bane, then characters are mine, I straight out avoid painting them lol We should do a collaboration at one point 
Omg... that would be absolutely amazing! Yea! I'd love to collaborate on a piece!Whenever ya like, I can make a rough draft of a character over a rough of your background or vice versa.
Well, if you are up for it, I'd really love to do it at one point. I currently have a lot on my plate, but when work clears up a bit, I'd really love to collaborate with you. Can I send you a note, when the time is right for me?
Sounds great to me, just send me a note whenever. 