A long time ago I had noticed a trend developing on reddit where people were starting to preface their comments with: "I for one". It's pretty insignificant, which is why I never made a post about it at the time. Since then, its use seems to have spread significantly on the site and I've seen it a bit here as well.

It makes sense to use the phrase when talking about or quoting another person to help separate their opinions from your own. The weird thing is many people now seem to use it when its not ambiguous that the comment is their own opinion. I was under the assumption that the default position should be that the comment is the opinion of the person that posted it.

For example:

"I for one, prefer dark chocolate over milk chocolate."

Is the same as:

"I prefer dark chocolate over milk chocolate."

There's nothing wrong with using the phrase, it just reads like someone trying to pad out an essay for school.

Have you noticed people using the phrase on other sites? Is it a phenomenon more specific to reddit?
Do you use the phrase yourself? If you do, what is your thought process when typing it out?