Grade 8 piano! I am in awe! Of all the instruments I've tried, I've found the piano the hardest due to sheer concentration, and being able to hold all the ideas about what all of your fingers should be doing at the same time has always proved too much for me. For instruments like the oboe (hi, Grade 6!) it's just a matter of playing faster and faster, but the piano demands so much dexterity that it still makes me quail. Play everything you like, more often!