What/who is the perfect kid?

Dear parents,
Ok, I know it may be a bit weird, but I really want to be the "perfect" child to my parents. I am 15, and so far, my grades are meh, meaning As, and a few Bs…they are decreasing from last term especially, like last year I was a straight A student, anywho, I go to a very tough private school, so the learning is much harder, I go accepted into a "special" math class for the top 5 students in my grade, which is equal to getting (in a public school) 1 year ahead challenged math. I love to write poetry, and am constantly writing it, I am not continuing the sports I was doing like a few months back, I collect coins, my friends are few, but the few I have the sweetest ones out there, they would give up their lives for me. I always do chores when they ask me and sometimes for no reason at all, I play an insturment, and I love to paint! I spend ALOT of money on clothes, and I know I shouldn’t but I recently lost ALOT of weight, and absically needed a new wardrobe…thats another issue, they think I am dieting…when I am perfectly normal….so any suggestions?? Or just what in your mind is a perfect kid?

OTHER FACTS
-At age 13 I started my own Charity (my parents donated hundreds of dollars to it)
-I DO fight with sibs
-There are disagreements, but I never say "i hate you" or something stupid like that

THANKS