Which programming language do you fluent to use? or, are you who fanaticism to one kind of programming languages?

For the ‘real programmer’, these questions are not required to be answered. Programming language is just like tools, which can be choosed to get the best tool, to solve the problem.
It is not like a religion, which should not be changed forever.

Another reason to change the language is about job, opportunity to increase the income.

The language I most loved is Pascal, but I have to leave it on the past, since the market is not accept it anymore. When the market is need a Delphi, I learn it, and there I go to fluent with it.

Right now, which language you should learn?

Ah, there are so many answer, depend on where are you living. But this article may help you to decide:
10 Programming Languages You Should Learn Right Now