Org mode is the only reason I use Emacs. Nothing comes close to Org mode. Actually, I'd say that I use Org mode, and I use Emacs only incidentally because Org mode requires it.

Because I used Org mode, for awhile I tried to switch my other text editing to Emacs. But without a good mode, it's not worth using Emacs. I do all my other text editing in Vim.