Its all pointless, no matter wether it be leaf or bag, premium brand or supermarket specials, unless you employ the proper process for actually making the tea. I.e. no milk in the cup with the tea bag before the water. Not pre-heating your mug or teapot etc. You can only extract the best flavour with boiling water, by pouring the water into a cold mug or pot instantly cools the water and reduces the flavour extracted out of the tea leaves. Its amazing how much flavour you can extract out of the standard branded bags if you take some thought about the brewing process.