I'm one of those people that feels like they have to have the whole album even if there are only 2-4 "good" songs on it. Storage space isn't enough of an issue to disturb my perfectionist aspirations.
In rare cases where I have no interest in the album or there is only one track I like, I have an "Unsorted" folder with 100 loose tracks in it. I retag those track to have the album listed as "Unsorted" so they are grouped tidily. The other 6,350 songs in my collection are part of complete albums.