one of the first couples games i owned and we enjoy playing it together...but we have so many good 2 player card games now that it doesnt come out very often. We love Race for the Galaxy and Ascension the most for couples play, though admittedly Jaipur is lighter and a bit more compact for travel. Biblios is the newest game for 2 I have, and is just about as small and simple as Jaipur, but quite a bit thinkier. I think Biblios will be hitting the table ahead of Jaipur for the forseeable future, but glad Jaipur is in my collection.
I have played Race for the Galaxy with coworkers and really like it, but I don't have my own copy because I didn't know if I would be able to get anybody else to play it with me. Some of my coworkers were turned off right away by the symbols and apparent complexity. I haven't seen or tried Biblios yet, but it sounds interesting! I'll have to check it out.