If I can print off "original" copies of the US and/or Canadian and/or English/Wales census reports at an LDS family history center, I try to enter all the information from all the individuals in the household. I also make notes on nearby households (often times, they are relatives) The original copies are most often better than the transcriptions as one's own transcriptions might turn out better than the professional transcribers because you know the families you're researching.
I do try to get every member of the family in the census report if I have the time to do so. In my rootsweb.com files, I've also included non-family members as well. Some times, the non-family members wind up marrying into the family at a later date. One never knows. I also try to correct bad handwriting and bad spelling. The census takers put their own spin on the names sometimes. Obviously, census records don't show a woman's last name at birth, for it's only been recently that women did not take their husband's name after marriage.