It is generally spread the rumour that if you put yourself in front of a piano and push you to improvise, you won't be able (at least not in the good way you want) to improvise unless you are victim of a marvellous inspiration. Rumours also explain that this inspiration lasts more and appears more often the more you play the piano and the more you improvise.However, why sometimes we just cannot play neither melodies nor accompanigments without being so repetitive, nor beautiful harmony, or at least being able to play that one we intend? There must be a reason, does anyone know it?Another important issue is the psicological effect in your spirit after playing either a learnt piece or improvising. This is a really subjective question, but I would like your opinions please. How does it affect you, specially which songs and what are their consequences?Sorry for my english, i am not native speaker!Mussels with nutella
It seems you are asking a lot more than a simple question here