What are all the Metal Subgenres, the difference between them, and some bands from each?
Check the recommendation thread at the top of the page. It answers all of these questions and more.
Too many genres to tell you the differences between ALL of them in a few posts. You'll eventually pick up the differences between genres the more you delve into metal and branch out. Also, do as broadsword suggested.
i like thrash metal the best... there is a forum or a thread about that.. search
ye ol' searchbar