I think peakd probably is where I spend most my time. I do not know if it has replaced other social media for me or if I just stopped looking at everything but twitter.
I am still trying to figure out where my nich is for my own business. started a few and never really went anywhere. Blockchain maybe a good place for me Just have not found the place yet.
I think you have a passion for sports man...That's such a huge untapped niche I think...Blogging, live talk shows, forums...All of that can be handled on chain for sure.
Or just be like me and think about Splinterlands all day LOL