Why do you have duck on your avatar?

Because ducks are cool. Quack.

Which language is the best?

There isn't best language. Each of them has their pros and cons. I've learned a lot of languages, so I can pick one I this is best to use in particular situation.

Which language do you recommend to learn as first?

Depends what you want to do. For some I've included libraries/frameworks I can recommend.

• embedded - C
• mobile (android) - Kotlin
• gamedev - C# => Unity / C++ => Unreal Engine
• backend - python => FastAPI
• frontend - JS => Vue.JS
• anything related to apple - here you go
• native (windows only) - C# => WPF
• native (crossplatform) - C++ => Qt
• big data - python
• machine learning - python

What is your opinion on X?

Languages:

• C - never use, no matter how good of a programmer you are you ARE going to make mistakes and C will only attempt to hide them from you.
• C++ - bigger brother of C. I believe that actual changes to the languages (not "additions") would make overall language much better.
• C# - aka "microsoft java", language that steals borrows features from other languages, pleasant to use
• Java - don't use, move to kotlin
• Kotlin - much better version of Java, has many amazing features
• Go - unpolished language with many sharp edges (error handling, lack of generics), I'm waiting for Go 2.0
• Rust - I haven't written anything serious in it, so I can't give my opinion yet
• Python - swiss army knife, does everything, use mypy
• JS - has some pitfalls, but after you fall in every one of them you realise it has a library for everything you could imagine

Also, ducks are cool. Quack.