Definitely, a smile like that fits Nagisa the best :).
Finally, for a change, a happy ending that I like in a KEY series . I can’t deny that the ending arc was rather weakly executed though.
Anyways, it looks like there will be another omake episode to cap off this series. One can’t deny that the comedy aspect of CLANNAD was integrated the best amongst all the 3 KyoAni-KEY series up till now, so more hilarity is always good :).