Personally, I don't like the hashtag method of building a following/interest/community, it's very poor in terms of cataloguing. It would be far better to have categories that you had to select by default when posting, then you could have targeted RSS feeds for those categories which in turn would lead to some clever person out there writing a reader app along the lines of TootSuite that would not only let you read and be notified of Steemit posts but all your other social media accounts. Even searching hashtags for "How to lick a hedgehog's back safely" will not pull in all the relevant posts.

P.S. That is a joke of course, I actually search for "How to date an aardvark legally" ;-)