Why did you want to have big muscles in the first place? Serious question.
I honestly wished to be skinny forever. I had six pack abs when I was ten years old. (began gymnastics at 5, was naturally adept though... only got put into school because I was doing flips in our yard as a little kid and my mother got sick of saying I "wasn't" in gymnastics, so they put me in)
I have freaky genetics and post-pubescent I was a blocky built freak looking for something, ANYTHING to do with the muscle I was given. I honestly thought I was given this muscle for a reason and that I should find something to do with it.. That I was given this muscle that would save my life someday. I knew I would never be skinny and didn't want to walk around like a tough chick, and said to myself "I just want to be pretty," So that's when I got into bodybuilding. I just wanted to tailor my body, and knew no other way to do it, besides making it a competition. I never wanted to be HUGE, I would have been perfectly happy growing up without it. I was 16 years old and had 14" arms. I remember a junior prom picture of me and my brother, flexing our arms side by side on our deck, and I had triceps and biceps and never really lifted a weight until I was 21.
I trained always, but ran a lot, gymnastics is an obvious muscle developer, I ran track (thus the quads) rowed for the Pitt Crew team (back), trained with Army ROTC in college alongside the MMA training (that's only to name a few sports I competed).. but this was all in search of a purpose. Just for those who don't already know I was born with muscle, I really was.. .I was a little kid, and my family would say "Sarah stiff as a board"-- I don't joke when I say I only bulked one time in my life... for only three months to boot. If you need an answer, there you have it.