Some like to listen to classical music, some to jazz, some to rap, some to rock 'n roll, and so on...

Here you can see an example of "to each his own" or "different tastes for different folks."

Likewise, some are big fans of the English language, some of the German langauge, some of Turkish, some of Spanish, and so on...

What kind of people are likely to like the English language the most?

And can I discern who is such a person? How can I?

If one likes very much to visit the UK or the U.S., is he or she that kind of person? If one likes very much to read the English literature, is he or she that kind of person?

Perhaps ... those who like the English language very much are ones who use it also out of pure hobby.