Like ibsulon said it's all a matter of taste. When I was very young, we lived on a farm and had well water. I would go to school in the city and I hated the taste of the water there. Later we moved to the city and I remember how I then hated the taste of the water at my relatives' farm house.
If given the choice between a bottle of "spring" water and filtered water, I always go with the filtered one, because I think it generally tastes better (and more like the water I drink at home). I always find the "bottled water is just tap water" meme annoying, because it generally isn't "just tap water". It's usually water that's been through reverse osmosis filtration and had added salts. That's like saying that spring water is just rain water found in your local puddle.
