i think locating a HOST for your WP also comes across that you value the flexibilty that WP has. you appreciate WP and the many things that WP can do and the fact that if you play around with long enough, you can make a contribution back to the WP community.
besides that, you are allowed to customize your WP.
also, it speaks volumes to your visitors, whether you publicize your site or make it personal, you take your site serious and others will as well.
i tend to like visiting sites that have at least put some thought and time in acquiring a domain and i tend to AVOID the FREE hosting sites because all they do it enforce ads to be placed on your site which takes away from what you site is about. plus with many hosts, you also get a email address at yourdomain and you can lay aside your hotmail or yahoo account.
just my two bits ...