Are you confused to choose best niche before building a new site? Afraid to choose general and popular niche like weight loss, insurance?
These niche ideas will help you to get more fresh niche idea.
After you get this list, what you should do is doing keyword research properly.
Even, from most of the niche ideas list, you also can pick one and make it as TLD domain (.com/.org/net) since there are still many chances to get it.