What are some possible conflicts in a relationship of a Christian and an Agnostic?

[ThirdRock]

Like a romantic relationship

Age: Both are 25.
Both are mature individuals.
Both are lawyers.

I already know about:
-Future of Kids
-What kind of wedding (Christian/non Christian)
-The Agnostic staying at home while the other goes to Church.

Anything else? List everything possible please.