Good post. I'm not sure I agree w your metrics however. If I had to say myself the significant tags I use would be steemit (but can be omitted in general since it's ubiquitous) steemit-help minnowsupport newsteem and discussion. I don't remember having used #life more than once ever and also should be omitted from analysis because it's so generic and over used.. that's all just my opinion. <3
A better metric might be "tags most commonly used by..." However sounds harder to grab that data... Idk
RE: Steemfest: An analysis of the tags used by Steemfest attendees