One of our readers in India, @cliffordanup let us know us that Cortana now includes more categories of interests. Well, I checked, and it's true. At this stage though, I'm not sure when this update sneaked in and which are the specific markets where the new list of categories has been introduced.
The Windows Phone 8.1 Update 1 brought Cortana to China and the UK in beta and to India, Australia, and Canada in alpha.
Before the latest update, Cortana users like me (India; alpha) had limited interests available – news and weather. However, there's a slew of new categories of interests that one can add and can keep a tab on, including very useful features like trip planner, daily routine, local events, eat + drink, fitness tracker, et al.
The gradual trickling of new features in Cortana's Notebook is pretty good for users outside US, and helps Microsoft gain a lot of data from diverse users in different geographies. Check out Cortana on your Windows Phone and let us know if there are new categories of interests available for you. Which are the Cortana features that you find really useful? Shout out in the comments!