Hello Mr Biceps,
First thing I will tell you is my age soon to be 48, height 6'2" tall, natural weight is 220 pounds.
I do gear for a few reasons,
To be much stronger than my natural capabilities,
To increase my sperm within my body. When I'm on gear and I have sex with my girlfriend, I can dump HUGE LOADS of cum in her hotbox or other places on her body.
She loves that! When I'm off gear not much sperm comes out of the pecker if you understand my lingo. It's such a drastic difference.
I do gear for my physical appearance and I suppose vanity is involved and also a sense of well being.
I realize my reasons fall into the shallow category but I am giving you the truthful reasons instead of bullshit fake reasons.

I look forward to your reply. Thank you!