Nope... Not all people are sweet... Only people below the age of 11...

About 50 years ago the age to get sweet to sour was 15.

Now, it's 11 so one can imagine how unrealistic an anime get sometimes...
But CCS is a work of fiction, so it really doesn't matter how sweet the characters are. What matters is whether one enjoyed it or not. For once I enjoyed it. And plus, CCS is a kind of Shoujo. We guys are more apt for shonen... don't you think so?