By Timo1:
......often they want to make it sound better by jazzing it up changing some things NO! Not at this point! Follow the notes! learn proper fingering! Rythms! learn the theory behind your chords etc......

The story of my life....

Following is a conversation between me and my teacher that happened the first 15' of my very first keyboard lesson:

Teacher: Ok, now with the right hand hold down the chord you see on the staff with the fingers corresponding to the numbers you see above it (C,E,G chord, fingers 1,3,5).....no, not like that (1,2,4), use fingers 1, 3, 5.
Me: Nope, using fingers 1, 2, 4 feels more natural to me, I'd rather do it my way.
Teacher (wide eyed in shock): No, don't make me hit you on the head, you will do as I say.
Me: But why?
Teacher (shouting): Because I say so and because that is the PROPER way to do it!

If you see me play you'll realise that still, after almost 12 years, I can't put my fingers on the keyboard properly. Not her fault though.