Appearance matters to visitors. I for one go blog hopping and sometimes skip those that are a bore at first glance. Also when it takes too long to download the site, and when it gives me the headache to read through amongst the fonts and the prints. Professional sites especially need a more appropriate layout, and not like personal blogs wherein one can choose whatever suits them. Navigation have to be simple and easy.
But then our concern not only focus on those visitors that came upon our site, we need to be easily searched thus stuffs like search engines, keywords, Meta's, PR's, etc. are also a need for concern.
Not everyone knows this, and it definitely is worth having a professional to help you with your website; and Austin wordpress expert is the one for you!