I'm proud that during my adolescent years I NEVER complained (but I mean I didn't do it outloud). Also I did my best not to gossip, not to critisize and not to hurt anyone's feelings (I did it simply because I knew how all this felt and didn't want people to experience this at least from me). As for not complaing, however, I always thought it was just my being very reserved and not able to open up my heart. Later I decided I had to learn to complain maybe to let my feelings go in order to make me stronger (as an analogy with crying that common wisdom has - it takes much courage to cry and really strong people can afford it). And you know what?! I found out that complaing actually DISEMPOWERS you. So I'm now getting back to no complaining again
And, besides, reserving some of your emotions doesn't make you dry-hearted or uncommunicable, it may even happens vice versa, that's what I think.