Define supernatural. Besides that, I'd have to have SOME sort of evidence for a start. Anything beyond cultural memes would peak my curiousity. Certainly if God spoke to me directly, I'd want to investigate that. But I'd also be curious if even indirect evidence appeared that could not be rationally explained. In that case I'd not leap to a god-of-the-gaps conclusion, but I'd want to investigate and maybe just maybe that would lead to God.
I do however not feel a huge burning desire to know one way or the other if God actually does exist. If he does, he hasn't had any meaninful impact on my life, and if he is a nasty God who punishes non believers in teh afterlife, I'd not respect him or want to worship him anyway.
Any god who isn't a monster can safely be ignored until it presents itself clearly. Any god who is a monster isn't deserving of my respect, much less my obedience or worship.
If I had a strictly personal experience, for which I could produce no objective evidence, I'd first question my own sanity. As for proving it to others, by the definition of above, it couldn't be done, so why spin your wheels?
Well, clearly I'd be right and they'd be wrong, and I'd have to forcibly convert them for their own good, or kill them, for they'd taint the rest of us with their horrible heathen ways. Maybe I'd burn them at the stake. It'd make for quite a show, to get the others in line, and it could be used as a fuel source.
Kidding. Kidding.
Well if I found a God and he had a code of behaviour to follow that was to me unethical, I like to think I'd have the guts to stand up to him. I'd certainly like to think I'd not bow down to a tyrant God, out of fear and cowardice.