Inge - all you need to do when asked why you left is that there was no personality match with your colleagues, that there were differences of opinion in work ethics and that you felt that their approach was not what would work for you. You can then stress that you are not one to rock the boat or be difficult but that you have strong work ethics and although you are flexible in many ways that their work ethics and yours clashed and became an unworkable situation.

Good luck!!!