I have, but I wouldn't say it only applies to these kinds of short series, Code Geass, as an example, made kinda sad.
I was also sad to see the ending of FMA as it meant no more FMA..You must be registered for see images
About Naruto; I don't know, I haven't read the ending yet, so I can only guess I'll be sad to see it end as well~

Naruto can't compare to anime's that are 24 eps with a good story. When those end I feel shit for the rest of the day.
yh i know do u know some good ones
Ive watched 139 animes and currently following around 10 weekly, what kind of animes do you like.
NARUTO. WILL. NEVER. END.
it sells to much to end it.
It will end, I'm willing to bet on it. What say you?
If you're looking for animes, then anohana(Ano Hi Mita Hana no Namae o Boku-tachi wa Mada Shiranai.) should be able to make you cry or AIR.
That's one hell of a name.
Yes I did... Gurren Lagann ( most epic Anime ever IMO U_U )