Same here! But my ears have sounded slightly different for as long as I can remember, so it doesn't have anything to do with hearing damage as far as I know.
There was an old thread on this same subject, and I'm pretty sure that the conclusion was that both ears aren't identical(even from birth), and will therefore sound slightly different no matter what.
I did a hearing test last year where they didn't detect any damage, and the fact that I perceive sound in my left ear slightly more present didn't show up on the tests. I'm VERY anal about always using ear plugs, and I hate doing FOH because of the volume.