I love a bath; however, I usually follow it up with a quick shower. dabeaner is correct when he says that a shower is healthier because all the impurities of the day are being washed right down the drain.
In a bath, all the impuriites from your body and the environment are washed off and left in the water. You do remove some of them when you towel off; but, a quick shower after your bath is best.
For sheer relaxing ability however, a bath is tops!