For years, I thought Brita filtered water tasted disgusting. This was based upon my experience with Brita filtered water jugs. The water came out with gunk in it and tasted chalky.
Gee, guess what? My little habit of not reading directions can be really stupid. I didn't soak the carbon filter or throw out the first two filtered water jugs.
Now, I have a Brita jug that tastes awesome and I can feel like a less hypocritical environmentalist.