I guess we're in the minority, but we're staying for 10 days/9 nights at POP Century (leaving in exactly one week - our wedding is this Sunday!). We decided to stay longer at the value resort (which feels more Disney to me as I've been to the world 12 times, but have never stayed on property) rather than a shorter stay at a more expensive resort.
And...we don't plan on being in the room that much as we've been together for three years and have lived together for almost a full year - we know what "that's" all about by now and we're looking forward to rides, food, fun, and the occasional "nap" -- if you get my drift!