It seems the responses you noted to praise demonstrate a lack of confidence, belief in oneself or some other character issue. In my opinion the response of a confident person/child might be more along the lines of --Yes, thank you for noticing and you should see all the other things I do very well--or something similar depending on age and maturity. The only time praise should be in question is if and when it is given without cause or sincerity.

I often wonder what we are creating when we "over praise" youngsters and give them unearned awards and/or trophies so they don't feel left out. It marginalizes true praise when it is earned.