I had generally spent a fair amount on books. I got a few romances from Samhain, Loose Id and Torquere in paper form before knowing that they had been e-books first, and then found that out, and got a few sequels in e-form. I tried a lot of new-to-me authors. For quite some time, I just got books directly from the e-publishers, then learned about e-bookstores, or e-book distributors. I'd started going to several other e-publishers by then, too.
I don't suppose I minded too much about prices considering that the books were so much cheaper in e-form than trade paperback form. Also, it wasn't like I could get m/m romances from other places. The books weren't on my already overcrowded bookshelves. I didn't like that you couldn't share the books or give them away, but accepted that that was how it worked.
I have very rarely gotten any mainstream publisher's book in e-book. I got A Companion to Wolves and The Tempering of Men also in e-book form because I wanted them in paper and e-book. I got a few Harlequins from Kobo because they were in the same series as free books -- yes, that one worked on me in a couple of cases.
Mostly, though, I like getting e-books without DRM. I consider the e-book prices against category romance and mass market paperback prices, and usually find the e-books cheaper.
I'll think about distilling that down for Dear Author, but may just be content to have my thoughts here.