It depends doesn't it? I'd not accept some sort of deal that gave me loads of money but left me riddled with cancer, say.
But I wouldn't necessarily mind being my age and having a body ruined by a lifetime of passionnate, animalistic sex with hundreds of partners, gluttonous consumption of every drug known to man, wild partying, unalloyed hedonism and bare-knuckle lesbian-boxing if I had actually done all that stuff. EDIT: We'll do some shark-taunting as well on reflection.
As it is I'm pretty fit for a 30 year old man who has had a very boring life but kept quite fit. 🙂