My guess is that while you
think that you can taste, you're not tasting to full capacity. I burned out my nasal passages many years ago, due to nasal spray abuse. I have severe hayfever, and...well, I'm not getting into that. I did it, it's done and that's that. I can, however, smell things that are..."strong". I have noticed, within the past year and a half, that I am slowly starting to regain it. Little bit, by little bit.
You, on the other hand, sound as if you've always been olfactoraly disadvantaged (Ya like that? I just made it up
) I would assume that you've seen doctors?