Can’t wait until search isn’t hashtag dependent but #grownostr is a fun one
Discussion
It also looks like some clients allow you to follow hashtags, but it's not universal.
I am using Snort. It has that feature but the interface is very slow.
I think the hashtag is a good way to start. Twitter was successful with the hashtag int he early years. We just need people to use them more in their tweets so we can discover users with similar interests.