Do you prefer double-sided print outs or single sided print outs?

I always prefer double sided print outs but occasionally when bound by some rules i go for single sided ones. Double sided ones saves not only paper reduces the weight when carrying a large document and also reduces cost. Since there are all these advantages i go for double sided print outs.

i print single-sided, because this way it is easier to follow and compare the text - when you put the pages one next to another but i keep the all ready printed for a second use - after some time i put them again, so another document can be printed on their backs and that is my contribute to the environmental and economical issues :) and that is how we proceed in the office too :) but, of course, the official documents for other people are only one-sided...

it depends on what i am printing. if i am printing for work, i generally do use double sided because i work at a not for profit agency so money is usually tight. at home, i am usually printing pictures, so single sided is best.