Model Railroad Hobbyist is a monthly online-only magazine about, as the title suggests, model railroading. The quality of the content is very high–I’ll argue the writing, editing and photography give Model Railroader and/or Railroad Model Craftsman a run for the money. I really think which is best in any given month has more to do with the reader’s interests than anything else.
If you’re interested in model railroading or any other hobby that involves trains, dioramas, or both, it’s worth bookmarking and visiting every month. Perhaps more frequently, as you peruse back issues for gems you missed in the past.