Really there is a constant flow of taste. Sort of how people go about their day hearing all sorts of noise, it just filters in as background. Constantly tasting things is the same, unless something startling happens, almost like a loud noise.
I have only recently (12 months or so) been able to diagnose this, and have not yet cataloged many things. While this does sound unusual that I would not notice it, it is like someone seeing the color purple. If no one else ever saw the color purple, how would you find out?
I heard some organ music a couple months ago, and it tasted terrible. The whole time I wanted to spit.
Depends on what you like for best. "Mustard" is a particularly spicy word, which isn't unpleasant.
No, I don't think so. There is sort of a feeble response, but I believe this is the brain falsely reacting to supposed known stimuli. Sort of like Pavlov's dogs. Every time you hear something, you expect to taste it. So when you think it, you are almost expecting to taste it.