Yep - I agree with the bulk of comments here.
I just try to look presentable. By nature I'm relatively scruffy (can't help it - think its genetic - I can crease anything in 5 seconds by wearing it!).
If I overdo the 'presentation', I just look fake, and feel uncomfortable (feeling comfortable in business situations is really important, IMO) - but back to the OPs point, I'm always clean, at least!
