At work, I grab bottled water, and when I leave the house I may grab a bottle. Mainly for convenience and at work more for hygiene purposes. But at home, I have filtered water, but I think our public water is pretty good so I just grab a glass.
I drink bottled water because we have well water and I don't like the taste of it. Most people that drink the well water at our house like it. I do use well water in cooking and ice cubes ets. If we go out I drink the water they serve.