Swedish Booklet Pairs Question(S)

Pardon my ignorance on the subject, but I'm a bit confused as to what folks collect for these, and since I have finally ventured into the 1930s in the Lindner album.... I thought they were collected as a pair with a left-side imperforate along with a right-side imperforate. Of course having them still connected would be ideal, but it seems that singular left/rights are still collected? That holds for booklets where they issued as 10 rows of 2 stamps, but some booklets seem to be 2 rows of 10 stamps, if that makes sense. So, its common to get a one-side imperforate linked to a fully perforated twin. These seem to be equally "collectible" and priced as such...
Are there any preferences in pairs?

well, if you own a facit you should just go with that I think.

i would personally stick only to pairs if they exist as you then in theory have the single as well, but 2 single does not make a pair.

this would just be to save space, it can look nice in a well mounted collection with loads of different variations.

boils down to: Do as you feel :)

Well, I collect Norway rather than Sweden. For Norwegian booklet stamps, my Stender album has spaces for both the individual singles as well as for the pairs, so that is how I collect them.

Thanks for the replies, I will check my Facit, was looking in Scott as I wrote this. It's a bit confusing because Lindner pages can have illustrated spaces for 2, or even 3 sets of pairs, when there is just one "pair" issued. It makes me wonder what everyone else puts in those spaces.