If your partner, family, friends etc, don't often talk about Jesus, and the things of God...they're not real Christians!
Do not be deceived.
I understand what you are saying and there is certainly some truth to it.
However, I think Christianity is about what God has done through Jesus Christ. The Bible is about God, not the behavior of people. People are quite helpless without the mercy and grace brought to us by Jesus.
Rom 3:10,
As it is written, There is none righteous, no, not one:
I think Jesus will be able to sort out those who are Christian and those who are not. I think there will be much more to it than who talks about him often and who doesn't. That is judging by appearances, which is not at all what Jesus does.
1Sam 16:7,
But the LORD said unto Samuel, Look not on his countenance, or on the height of his stature; because I have refused him: for [the LORD seeth] not as man seeth; for man looketh on the outward appearance, but the LORD looketh on the heart.