Did it at 18, mid 50s now - ZERO regrets.
- clothes fit (could never buy shirts easily)
- men talk to my face, not my breasts
- no more back aches, groves in my shoulders from bra straps digging in
- I can exercise, including running, without my giant boots bouncing all over the place
Recovery was 2 weeks (did it the week before spring break), and no PE for the rest of my senior year of HS.
Only awkward part (can look back with humor): running into another senior, a guy I didn't know well, in the waiting room of the plastic surgeon - he had gotted a nose job, as evidenced by the bandages