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Niche and Maximum Exposure are kinda contradicting concepts. If you want to have deep and meaningful interactions in some kind of specific topic (niche) you should think about things that you are really good at or what you really like and would enjoy devoting a lot of time to get good at. And do that. Not ask what people want on Hive. People want a lot of very different things. The key is to be good at those things and know what you are talking about.

I've been having some fun with Vimm streaming.

i dont think yherr is a particular niche tjat is the best.

you are the one to be yourself and use the right tag, and your People wull come and find you

How about writing about SEO, everyone will love to hear and love to read more about it.

That's a great idea. Unfortunately, I don't know much about that and have already asked a question about SEO as well. May be in the future when I have enough expertise and information on the topic.