Well Arabic specially Quranic Arabic as there are many good speakers in the world. Just google it peaceful even you can't understand but you will enjoy

what about you?   ;-)

for sure persian! i consider it as king of languages :D

I like the sound of French. 

Arabic sounds great

Ukrainian <3 and French. French because looks chich and Ukrainian because looks sexy and melodious, I also like Portuguese (From Portugal) because is my 1st langauge and very hard to foreign get a perfect accent :)