Anecdotally I've noticed backend devs often prefer Angular, and frontenders prefer React - just seems to be how they align to experience/expectations.
React is the most popular 2018.stateofjs.com/front-end-frameworks/overview ...and without any real context it's what I'd recommend as a general response. I often describe it as being "the jQuery of the SPA era" - a stable, popular option with a really big community.