<font color=blue>When driving forward, you're driving over the snow which causes it to compress and stick, and the blade won't remove it</font color=blue>
Jim;
My rear blade does an excellecent job of scraping right down to the pavement.
I usually clear the snow when I get home at night, so there's always tire tracks compressed in the snow, My snowblower generally will not scrape that off. I usually use the back blade as I'm snowblowing and it scrapes the tire tracks clean away, as well as any tractor tire tracks.
I think that plowing driving forward may be a little easier on the equipment too, because if you're driving backward, the weight of the blade, snow, and anything obstacles you will, are pushing against the 3 pt arms. I bent one of mine somehow during the summer pushing dirt.
The only "problem" with driving forward with the blade is that you can't pull it to the edge of the driveway unless you're driving off of the driveway. I then just turn around and snowblow that little pile or will push it back with the blade in reverse.