It's been a while since I've watched this now, but I figure it deserved a mention.
There is nothing that particularly stands out about the drama that makes it a must-see, but I loved how down-to-earth and honest the main guy was, as well as the chemistry between the main pair. It leaves more of that warm and fuzzy feeling, as opposed to making me want to slap the characters upside the head (à la Hana Yori Dango).
The situations also have less of that forced, artificial feel, which I think is what I liked the best. Like the way one character will talk right over another, who won't correct the first, and thus forcibly creates a huge misunderstanding for the next 3 episodes? Yeah, none of that. Woo.