Do you know some Italian? As soon as I learn a bit of any language I forget how it sounds. But I agree, Italian sounds good even though I don't know any.
People usually complain about German, but I think it sounds good :-D
Dutch bothers me because I feel like half the words sound like English but I just don't quite get them and it's frustrating.
And I like Brazilian Portuguese. I like Vietnamese, even though I don't understand it. but I used to rent from some Vietnamese, and they were sweet and it just sounds familiar, and they fed me some amazing green mango and seafood salad.