even though i’’m not a native mandarin speaker, but if you ask me, i would say mandarin chinese sounds the best to me. i speak both mandarin and cantonese. mandarin sounds better i guess, since it has less tones. i supposed the less tones it has the better it sounds. it’’s one of the reasons that makes people think chinese sounds harsh is because it has more tones than the other two languages. it also depends on who is speaking, it’’s a long story about chinese history and how it affects the overall education of the people, especially the ones in the US, where you would most likely encounter, but i won’’t go into details here.

　　most people think japanese sounds the best, well, it might be because of people’’s impression of how soft spoken japanese women are, and they really are, which makes the language sounds even softer.

　　different kinds of people have different rhythm when they speak. tones affect rhythm. since japanese and korean, like english, have less tones and are easier to pronounce, they may sound softer.

　　Source(s):solely my own opinion. no offense to any race.

　　虽然我的母语不说普通话，但是我仍然认为普通话是汉语中最棒的。普通话和广东话我都会说，我觉得因为普通话的声调更少点，

　　而更少的声调听起来更好听，比别的语言有更多的声调也是人们认为汉语听力很难的一个原因。这当然也取决于说话者，这些是