Sonoma,
Like you I have recently come from the short-haul world of nights in bed, early starts (Yuk!) and multi-sector days (knackered!). I traded this for the fatigue, boredom, and sheer exhileration?? that long-haul flying claims to offer.
I'm not sure if this has a negative or positive effect on my health. Dispite spending longer at higher (more cosmic radiation) levels, and longer periods awake, I still don't know if this is a "healthier" way of life, if compared to "rushing" around with your "A$$ on fire". I suspect not.
That said, my average blood pressure reading is much lower than it has been on SH.
Good luck sir.