I'm a uni student, my pattern is less of a pattern and more of a dysfunctional, erratic series of events.
Right now I'm on (winter) holidays, so I do a whole lot of nothing (working wednsday and sunday nights), however this weekend I'm working 3 day shifts (fri, sat, sun...I dive on any weekend work available to me). This isn't uncommon and I take such shifts whenever they are available.
During term, if it's summer I tend to timetable so all my classes are monday/tuesday/wednsday (meaning I have like 24 contact horus in 3 days) then work thursday/friday (as well as my regular night shifts, last summer I worked 5 40 hour weeks on top of uni in a row, with no day off, as well as another 3 or so after that with one day off, shiftwork is fun). This forces me into a cycle of early mornings and early nights, getting up around the 0700 mark and crashing well before 2200.
Summer holidays are an endless grind of working 0800-1700 with as many weekend or night shifts as humanly possible, it won't slow down unless I get sick (which is yet to happen, there is no sleep pattern here due to nightshifts, the only consistant thing is I get up around 0700). If it isn't summer I spread out my timetable more and try to avoid morning classes wherever possible (meaning I can sleep in to about 1030), I also spend a lot of time socializing (In the past week I've spent one night in my own bed as I've been sleeping at mates houses *not sleeping around with the girls unfortunately*, this is not unusual for this time of year).
Because of my irratic work patterns my sleep pattern is somewhat broken and I have no real cycle, it also means that for several months a year I have very little contact with my friends (which gets hard after a while). The upside is I have a lot of money to blow, have proven I'm independant by earning enough money (which means I now qualify for government checks, how such a retarded system came to be I'll never understand). I hope to put down a deposit on a house near uni next year and lease out rooms, so basicially if all goes as planned my hard work should pay off within 5-10 years (seems appropriate to give some insight to my motivations for sacraficing my social life and general wellbeing).