Flattery is like cologne water, to be smelt of, not swallowed.
Commending communications ought to flow from us without too much concern with "the balance of trade." There is a straight and narrow path of communication, and off to each side are the perils and pitfalls of poor communication that is too caustic, too flattering, too little, too much, too general, too narrow, too soon, and too late. In the case of commendation in particular, sometimes it comes too late to be maximally helpful. Further, if we are not careful (and there is this tendency sometimes in the Church), we may be a little artificial and flowery. We are quick to discern undeserved praise, which we then discount—along with the credibility of the giver. Sometimes we even communicate too soon. We have all had the experience as parents of being so anxious to praise our children that we sometimes overpraise them before their job is done.
What I have found with the successful people I have worked with is that they are focused much more on the work then on themselves, at least early on. It’s only when success comes and you have people whispering in your ear how great you are, that that awareness begins to fade. When it does, these people begin to risk all they things they worked so hard to build.