Favorite bathroom cleaner?

I really like the "Comet" bathroom cleaner, although I don't like the fumes. But we have very hard water, so it's necessary to use some heavy-duty products to counteract the stains and deposits that build up. I alternate between using Comet to clean everything, and a spray bottle with bleach for the mildew spots in the corners. (And every day, we use the daily shower cleaning products.)

I've tried several enviromentally-friendly(ier) products that are supposedly as effective as the more caustic stuff - but they just didn't work as well. (And it's not just the psychology of a clean "smell" to the room either - I scrubbed and scrubbed and scrubbed and it didn't take off the hard water stains.)

Anyone else have a favorite bathroom cleaner? One that might not force me to hold my breath for several minutes while I clean the shower stalls?