Thanks for all your replies. I think I remember reading on the internet that water with minerals is ideal, but since I recently bought a Brita Filter, I've been using that with good results.
I've also read that the water should be aerated (with oxegen), so when I pour the water in the kettle, I pour the water from about a foot from the kettle (aerates it somewhat). It might not be doin anything, but who knows.
TeaFanatic wrote:If you are willing to pay for it, then spring water with minerals is probably the best way to go. I personally just graduated from high school so I don't have money to pay for water, so I use my fridge filter which works pretty well and makes good tasting tea. You could even filter your water twice (once with a tap filter and once with a pitcher filter).
You can make good tea with almost any water, in my opinion.