1) It's a very beautiful and rich language with lots of interesting nuances

2) I love the U.S. and their history so naturally, I want to learn the language of the country I'm interested in

3) Tons of interesting and helpful articles/videos on the Internet are in English so I'd be missing out if I weren't learning it

4) Now, when I'm already pretty advanced in English, it's kind of past the point of no return so I don't need any motivation, I just learn new words along the way as I read or watch something in English

I need English for my career.

Speaking English with other people motivate me the most.