In general, I don't care for the "married with kids" scenario. The idea that these two agents would have time to create a blissful home life with a family seems like a stretch, given the demands of their profession.

At times these family scenarios are so wholesome and happy that I find them unrealistic. The kids are just too adorable. Of course I'm generalizing--there are some very well-written stories out there.

I enjoy stories with a love interest, or a spouse, but the interaction between the two characters has to feel authentic, and must take into consideration the stress caused by the career the guys have chosen.