My favourite one...
I think, that I haven't got a favourite language.
English pronounciation is as beautiful as simple for me :) This is the greatest advantage of this language.
Next - German. When I was at the very beginning, no one was aware how angry I was;) It seemed to me, that I was a hopeless, good-for-nothing creature, because - I can say it with a clear conscience - I understood nothing.
When I managed to say something 'auf Deutsch', I was on cloud nine but not German, but English words came to my mind. Always English and everywhere English. It was horrible. During the first month I was down in the dumps. But I was getting accustomed to German pronounciation, I found advantages of this language, it didn't sound so strange.
Now I've been learning German 17, 18 months or so... I don't remember :) Anyway, more than a year. I found English beautiful and German as well. Certainly, I know much more nowadays.
But it isn't the end :) Now I have been learning Spanish for... maybe 2 weeks. I know little, very little but enough to state, that Spanish is a beautiful language:). Am I crazy? No, I don't think so.
Every language is unique and beautiful one way or another.
Although, as far German is concerned, it was hard...
For me all these three languages are beautiful - and I suppose, that I will find beautiful every language, which I will learn. :)