my left leg is almost an inch longer than the other but my hips have adjusted so that now my hips are just off a little, but because of it i cannot do squats because that much pressure on a crooked spine could pinch a nerve or make a vert slip
Anyway, I wish I was semetrical. Trying to work on that also right now. More unilateral work should help. My left tri is a little smaller than my right, as well as my left calf and delt. I think I carry more bodyfat on the left also. Honestly though, I think most of us, unless you are being studied on stage by the judges, are the only one's who notice our own slight lack of semetry.
The only thing that would suck would be an unbalanced chest. It is so noticeable. A slight difference in arms, legs, or delts isn't too bad, but both sides of your chest are right next to each other. Thats gotta suck.