I've read those same ones too, Glice. I probably go back to Either/Or, Stages on Life's Way and Philosophical Fragments the most (to further elicit their meanings), but I don't know that I've reread those in their entirety because they are rather lengthy. All the above (as is the case with the majority of his writings) are, as you know, pseudonymous works. With their dialectic of meaning, they were written to prepare the reader for the edifying discourses. All of mine are the Howard & Edna Hong translations, the ones most widely in print.
By contrast, Purity of Heart is to Will One Thing: the Good in Truth is a slender volume (that I've reread many times, thus the mention under "a book you've read more than once") containing (as implied in the title) one of Kierkegaard's rather religious (although, as you know, he broke from the Church) edifying discourses. This particular edifying address (as they are also sometimes referred) was his first to be translated and published in English. So whereas it might be "minor," as you described, in size, I do not feel that it is minor in importance. I don't know how much you might enjoy it, (it espouses persistent self-examination) but here it is online:
http://www.religion-online.org/showbook.asp?title=2523