The Paradox of Power....

[Esquilax]

What is your intention.

To believe as many true things as possible.

Do you want God to exist?
or 
Do you want him not to exist?

It very much depends on the god. There are some gods that it would be nice if they existed, and some that it would be bad if they existed. However, what I want to be true is also irrelevant in a conversation about what is true, and even if the god you believed in was one that I didn't want to exist, I would still accept that it does, indeed, exist upon being given a sufficient amount of evidence.

There are plenty of things I don't want to be true that still are, and I accept that they are anyway; I don't, for example, want mass shootings to exist, but I still acknowledge that they do. If I gave you the second answer to your question, that still wouldn't be a reason for you to throw up your hands and not proceed any further, because not wanting god to exist is not the same thing as being closed off to any evidence of his existence.

Would you be happy if he does exist?
or
would you be sad if he does exist?

Again, it depends on the god and what it's about. But also keep in mind that my happiness is not relevant to reality; the universe doesn't exist to make me happy, after all.