I like Python's syntax, I enjoy how easy it can be to get up and running with something real. I also like that Ubuntu comes with it, but everything else is crappy. I don't like the package system, pip is not that great and needs work. The almost cult like refusal to upgrade to 3.x weakens the community resulting in less available modules. It's also not a very strong contender for web development.
I really need someone to explain to me what they love so much about React.js. I tried it out and I absolutely hated the way components didn't understand their relation with other components. I had to chain a callback all the way down to my ListItem Component just so it could set which item was selected in the component and let other components know that. If you ever end up adding another parent component you have to rewrite all those top level components to pass that information down.