Interesting thread and some great points raised.
I'm an Advanced Coach based in UK. I've worked with junior squads, individuals, beginners and trained youngsters to international level.
The first one or two sessions will determine whether the coach feels the player has potential to progress and reach the standard they aspire to. After that, it's down to the coach to ensure that they get the correct training to meet their abilities and the player to put the effort in.
The coach also has to be able to adapt and coach various ways to achieve a goal rather than being inflexible. The coach must therefore quickly understand the players learning style and playing style and adapt the sessions to maximise the players results.
The coach must also be outwardly focussed. Only the player and their results matters. I've seen too many coaches who try to build squads of "their" players who they "produced." Rubbish!
The coach must allow the player to grow and obtain as many badminton experiences as possible, even if that means seeing another coach.
A coach does not produce anyone. They assist in the accomplishment of skill, but, at the end of the day, the players must master the techniques and skills in order to progress.
The coach should continue to be up-to-date and not set in their ways. New thinking is developing all the time due to the changes in the sport. Players are fitter and faster and therefore the game is evolving. A coach must embrace change and update their thinking and coaching to fit with the developing game.
The relationship with the player and their progression is always in a state of evolvement. A good coach recognises this and nurtures the player beyond their previous level of competence.
A coach must be a confidante, friend, teacher, brunt of bad jokes and many more things. The bottom line here is that the players must trust their coach because, at the highest level their results may depend on the coach delivering the right advice at the right time.
A good coach will also be there for a player in spells of poor form or to help them through injury and onto court again.
In others words, a good coach has got to be more than just a coach. They also need to recognise that they can't do all of this for too many players.
Hope this helps.
To your success
Paul
www.badminton-coach.co.uk