I do have presences on some of the social media networks that exist.
The issue with social media is not having enough direct control over what you want to share with whom you would be okay sharing. As before, there ain't no such thing as a free lunch, and you pay for it with your data. How much 'payment' depends on the company, of course, but it is increasingly harder to get away from the silos in the absence of the good ol' webring.
In no specific order, a list of links that all point to my face elseweb: