Try getting a bong/bubbler and buy some flavor drops at a head shop. Put some of those flavor drops in your water and that should alter the flavor a bit. If you don't have a bong, or don't want to invest in one, buy some of the flavoring and apply one drop to your bowl. That should also change the flavor quite a bit. There are a few threads on flavoring. I think there's even still one on the "Medical Marijuana Methods" forum homepage.

Mixing weed with shisha (what you smoke out of a hookah) may be a good idea, if you have a hookah. The shisha is meant to be heated indirectly, not with an open flame. Mixing shisha and weed can be done in a hookah, but applying an open flame to shisha makes it all the more worse for you.