Nope... even the seniors who've been at the job for more than 2
decades still have difficulties with their sleep and we all suffer
from sleep deprivation, some worse than others. 
The rotating shifts sometimes drive us crazy. That's when I started
my narcoleptic episodes, as Bear would term them. You'll find it's
common to have insomnia for a few nights, and then crash for one
day.
Think about it, I used to be a morning lark, now, I've evolved to a
Night Owl! 
We are on 2-week rosters, because our rosters are only released for
two weeks each time. You'll get your next two weeks' roster from
the mid to end of the 2nd week.
OK, here's a random eg. of a roster, bear in mind that no two weeks
are the same.
D= Morning shift
E= Evening shift
N= Night Duty
RD= Rest Day
SD= Sleeping Day (meaning, you finish your night shift on the
morning of this very day, so you won't be asked to return to work a
2nd shift on the same day, after you've completed 3 or 4
nights)
DO= Day Off, we get a Day Off every two weeks
1st week:
RD, D, E, D, E, D, E
2nd week:
D, N, N, N, SD, RD, DO
On the 1st week, we have the much-dreaded 'PAP' roster, which means
the PM-AM-PM roster. It can KILL you. When you work evenings, you're supposedly off at 9:30pm,
but you don't get to leave on-the-dot. When you reach home,
depending on where you stay, it'll be 10+ to 11+pm. And the next
morning, you're on the Day shift, which means, you might have to
wake up from 5am onwards to get ready. This pattern repeats itself for the entire week...
Nasty!!
The nurse managers try their best to give you a SD, RD, DO after
you come off nights. If not, at least, a SD and RD. But, there have
been cases of just SD, D, which can be a killer too because you're
more or less like a zombie!
I guess it depends on how bad night shifts in your assigned ward
can be. Generally, you'll be stretched to the max with a skeleton
crew on duty. And if your dependancy rate of the patients under
your charge is high, you'd be kept busy the entire night. Bad
nights you'll barely finish your work till the 11th hour.
Reeeeeeely bad nights you'll have to sacrifice your break totally.
Nightmarish nights you only get to sit down a full six hours or
more after you started work. These have all happened before!
I've heard of occasions when one of my 'jinxed' colleagues were
around, THREE resuscitations, one after the other, and on top of
that, one or two admissions!! The devil was on duty that night!
