Spoiler (highlight to view)
Keitaro chasing Naru all over Japan and causing a bunch of chaos, and finally Naru admitting she loves Keitaro as she falls after him when he falls off the cliff. All those chapters just had me glued to the screen.
I felt it kind of dragged on a bit after that, but it was still interesting. I think I might have been more inclined to choose Ichigo 100%, but the end just made me depressed beyond belief. Spoiler (highlight to view)
Not because Manaka chose Nishino (I preferred her through most of the manga), but I just couldn't stand seeing Tojou sad like that.
I could go on, but I wrote the rest of what I thought about the ending on the forum http://www.mangaupdates.com/showtopic.php?page=5&tid= 89.So, my final choice is Love Hina, but they're both great reads anyways.