What about if what you were providing was great, unique content that wasn't all about making a sale but actually giving something of purpose in a non-corporate, more personal manner ?
That gets back to the question I was asking before: would your readers be interested in the content, even if they were not at all interested in your product? If so, it's a personal blog. If not, it's a marketing blog.
If you're trying to do marketing, "a more personal feel" can quickly cross over into a faux-folksy style that comes across as really insincere.