Can you take a photo of it now, before you do paint it? There are as many ideas to spruce up a fireplace as there are colors to paint it.
I am not found of painted brick in a home personally, but depending on your fireplace, its condition and your interior decor, would determine my answer if you should or not. It is really a matter of personal choice.
Yes, Lew. Post some photos and you will be amazed at the ideas you get.