Well.. Even people who aren't christian seems to say, "Thank God."
I think as a Christian, that we should be thankful for everything.
Say, Obiwon, what is their tone when they say "Thank God"?
Because there's great meaning behind that. I mean, for Christians, we know that we can't live a day without temptation, from sin that is. We are all sinners, and we can't avoid sinning without the help of God / the Holy Spirit. So whenever we do something, we thank God, for being able to do that. Sometimes he/she might be thanking for the gift that God has given to him/her.
After seeing a test, well I would thank God for letting me get through it. I don't thank God in reality, because I already know that I have that ability, but for that ability I thank God. Some people have difficulty seeing a test, and might thank God for getting through it.
But on most cases, I hear people say "thank God" in a tone which isn't spiritual but more of "yay, im through." As a christian, we thank God for everything.
Of course.. there are also Christians who don't live like that. And it continues to go on as why Christians aren't reliable. Even once someone meets God or experiences His presence, that doesn't mean your getting into heaven.. It might seem like a lot of bullshit if your Christian or not related with it... but just want to say that we shouldn't judge anybody or religions.