I don't really work so sometimes I only sleep every other night. Gives me a lot of time to waste my time on cartoons and internet. Since I don't go out much I don't use that much energy either.
It really depends on what kind of anime I'm watching, if it's a good one, it keeps me up until 2 - 3 am.
Or I do not sleep at all when I have insomnia and watch something to "try" to fall asleep.
for me its i bit different
i watched anime in schedule
i set anime i have to 3 class
1- morning (i watched this kind anime on the morning)
example: angel beat, mushishi,natsume yuujinchou
2- afternoon/evening: baka to test, baccano, eureka 7
3- night : Another, ao no exorcise, fate zero, bakemonogatari
Since I grew up on toonami I'll have to say I have been a vetern at staying up to watch anime since childhood~ I'll say 2 to 3am average but I do sometimes stay awake till toonami ends which is at 6am. I get insomnia from time to time...>_< Always depended on what they were showing that night and how excited I was in the past~xD
Staying up after 0 AM just to watch something always available in the internet?
I mostly just stay up late to enjoy some important live sport event like CL,some domestic,international league or playing video games,surfing the interweb.That some shit deserve for me to stay up till dawn and like Rys said,i watch anime whenever i want.Probably cuz im not a big fan of animu too
Sleeping isn't something I do too often anyway unless I've got some important shit to do the next day. I usually sleep from like 6 or 7 AM 'til noon, though, if that answers the question at all. I guess a better question would be do I stay up later than that, which if the series is interesting or engaging enough, then sure.
I'm a 27-hour man living in a 24-hour world, so my sleep schedule goes all over the fucking place. The only days where I wake up at the same time every week is monday, because FUCK monday yo.
I usually watch them after its completed and that takes me about a few hours to a day(maybe) but when i can't resist i watch the episodes per week so 30 mins to a few hours..
its a different story on marathon though XD a whole day or a week maybe
Depending if I am completely enthralled by the show I'll watch it from start to finish. Latest that I could bear would be 7A.M and then I pass out for the day.