I guess it depends a little bit on what you want to do with your programming. I've tried python and c#, dabbled in cpp, but my favourite remains JavaScript.
Some of the reasons why I like it are that browsers have many features you can access (like files API) so it's easy to make something useful, you can easily debug your code using the console and there are literally hundreds of good sites to learn from. If you want a good tutorial to start with then try free code camp. It's where I started and I think it's excellent.