Social media interaction is between people so use your own face to brand your posts where possible. You could get a great professional portrait shot done and use that.
This was taken from Business Link
Business Information Online: November 2010
11 free ways to promote your website
Simple website promotional techniques can be undertaken by the business owner, or an appropriate employee, in the course of every day. Taking some of these actions, depending on the time you have available - in conjunction with a professional search engine optimisation strategy delivered by a digital media specialist - can really pay dividends.