I use NetNewsWire these days, but for anyone who wants to dabble in RSS with minimal investment, I highly recommend FeedBro, a well-executed Firefox add-on. It

I use NetNewsWire these days, but for anyone who wants to dabble in RSS with minimal investment, I highly recommend FeedBro, a well-executed Firefox add-on. It has a highly customizable UI. It handles all the fetching/refreshes/storage right in your browser, no need to install anything else or self-host a backend. And you can import/export OPML feed collections, so you can easily switch to another solution when you outgrow it. The only downside I've found: it doesn't sync between machines (at least, not for free). That's totally fine when you're just trying out RSS for the first time, but it does get annoying if you eventually want to read on, say, a phone, tablet, and laptop in different situations. For that use case, NNW + FreshRSS is my current, excellent solution.