When i chose a programming language, here is what i look for:

1. Amount of things I've to learn to completely utilized 100% features of the language.

2. Availability of well supported packages for stuff like elastic search, stripe, postgres etc...

3. Ease of making a function asynchronous. I love how go routines make it trivial and hated pythons way.

4. IDE and debugger: I am using goland now, and it is magical.

GO has provided me everything, finally i can focus on building my product.