I tend to boost a lot of content, in three categories:
Technical - mostly computer related stuff, mostly Linux or MacOS related. I particularly like things that make life easier for users.
Political - Mostly USA/Canada related although I may occasionally boost posts from other areas of the world. I oppose fascism and the politics of the extreme right.
Religious extremism - Particularly Christofascism and similar attempts to co-opt religion as a tool to advance fascism, hate and intolerance.
@Mir @rhymepurple Another place you can get free domain names is freedns.afraid.org - they have been around nearly forever and all you have to do is log into their site and go to any page once every six months (I guess so they know you are still alive) but they will email you a notice a couple weeks before that time is up. And at least for me they have always been very reliable.