(My answer to this question at Quora.com)
I learned a little bit of Norwegian during a summer holiday that I took there in 1981, which ended up being extended by several weeks, with a repeat visit a few months later, and another in 1990.
I was struck by the similarities between it and the Anglo-Saxon part of English (e.g., Skal vi gå roing og fiske? = Shall we go rowing and fishing?); enchanted by its distinctive rhythms of speech; fascinated that Norwegian mothers call to their small children with exactly the same expression and intonation as Jamaican mothers (Kom nå!/Com,nuh!); and marvelled how the vagaries of the Indo-European etymology can lead to virtually the same word—cald in Norwegian (“cold”), and caldo in Italian (“hot”)—having opposite meanings.
I would jump at the opportunity to complete my knowledge of the language, but that will probably have to wait for another lifetime…