Right now I'm reading James Hudnall's original "Harsh Realm" ... one of those out-of-print titles that's been on my must-track-down list for quite a while. Kobo has all of the also-out-of-print Middleman graphics available as well (and I'm planning on buying those as soon as my Paypal top-up goes through); I'm liking very much that they've got a lot of no-longer-available-in-paper-format titles in their catalogue. My still-favouritest feature though is that any title I purchase from them is mine, just like buying a paper copy ... it's downloaded into my computer in its entirety and I can back it up onto an external drive, load it into any device, or otherwise preserve it however I choose, I have multiple software options to open and read it (I actually find the ADE screen far preferable to the Kobo Desktop for comfortable computer reading), and if Kobo goes bust tomorrow I'll still have access to every bit of my e-library for as long as I want to have it. This is how I've always envisioned the concept of ebooks. :-)
Another interesting discovery ... the Kobo website has automatic Pinterest buttons on all titles. I don't recall noticing these before ... not sure if I just wasn't paying attention, they're a very new tweak due to Kobo and Pinterest sharing a parent company, or they only suddenly started showing because I finally created a Pinterest account. Handy, though.