Just to echo agreement to some of the comments already, I think beards are fine if well maintained and not of the designer stubble variety. I respectfully disagree with consultants that say you absolutely must look and act a particular way as I think it just boils down to common sense. If you are smart and presentable within given norms, are able to discuss complex issues in an eloquent and informed manner, inspire a level of confidence and reassurance, etc all those well understood consulting skills then after the first impression, your appearance will be less of a consideration than the quality of your work for the vast majority of clients. That's been my experience but open to correction. I think not wearing a belt is a bit like shoe laces being untied? Although to bring it up is really sad. And as for kissing 'European clients' it's never come up for me personally. Too trivial to worry about really.