for me a language is good sounding when it's relaxed and you don't have to press too much to make it flow.
Languages I like: Japanese(preferably without much dialect, kinda like actors or something... I don't know), Aramaic, Hebrew, Greek and Swedish. Sometimes Portuguese as well. I also know that there's African languages I like to listen to but I'm not too knowledgable when it comes to them :x
French, Spanish, German, Italian, Finnish, Thai... They CAN sound good but... It's too much of a hassle and things flying everywhere! Sure a language is good when it's not all blurred up but, if you take the French, they're so confident that everyone will hear the different words because of the mind trembling pronounciations that they speak really fast without separating words.
