(I never got a notification to say you'd replied, Dids)
I haven't heard of a continental shift pattern. Had a quick Google, which gave many examples. What pattern were you doing?
The best (for me at the time, it's all subjective, and I'd still happily do it now if the opportunity arose) shift pattern I've ever had was when I worked 1200-0000, Fri-Mon x 3, 2 weeks off, Mon, Tues, then rinse and repeat. Loved it. The worst was in Kuwait, leading up to/during/after Gulf War II. Permanent nights averaging a night off every 17. Crap times.