Mathemagenic

Was writing email answering questions about blogging and realised that I often do a trick. When I write about my own experiences I often start with I ("I blog because it's fun"), but somehow in between I switch to talking about you ("when you start blogging you often discover how fun it is").

So, a bit of wondering:

• Wonder how far this observation is true (didn't do any analysis of my blog posts, this is just what I think about how I write - should be easy to check :)? Are there others doing something similar?
• Wonder what does it do to those who read it? Helps to associate with my experiences? Helps to build trust? Gets into (un)critical mode?
• Is there a similar trick in whatever "how to write/speak" recommendations?