Judging only by how they sound, and considering only those languages I know enough about to comment on:
Best: German, then Norwegian then ecclesiastical Latin
Worst: French, then Spanish, then English
I have heard some Sanskrit and Hindi from Indian friends. They sound very intriguing, but that's not the same as aesthetic appeal.
Hope is the denial of reality. It is the carrot dangled before the draft horse to keep him plodding along in a vain attempt to reach it. We should remove the carrot and walk forward with our eyes open. -- Raistlin Majere
In that regard, Brazilian Portuguese is wayyy more interesting, as it has more vowels and some really interesting stuff, like t,d becoming ch,j before i which makes otherwise boring "presidente" into "prezidentchi".
Wow, you seem to know a lot about languages. I laughed when I read that because it's so second nature to me that I hadn't stop to think about it. ''Prezidentchi'' sounds much more fluid than president, I believe... I think Portuguese is generally more smooth than English.
Brazilian Portuguese also has interesting stuff going on with its R's and L's. I love how "Brasil" sounds like "braziw", for example. :3
I only speak English and Portuguese, which makes my Portuguese bias huge. I like how we can make words with ''inho'', which serves as a diminutive (e.g. Ronaldinho = ''little'' Ronaldo). We indeed use a lot of vowels, which makes the speaking more pleasant, I believe.
A pretty efficient language, but phonetically I don't like.
I don't know much about Spanish but cussing in Spanish sounds really amazing.
A man builds. A parasite asks 'Where is my share?'
A man creates. A parasite says, 'What will the neighbors think?'
A man invents. A parasite says, 'Watch out, or you might tread on the toes of God... '
Italian, Icelandic, coastal southern English (my native language and dialect...I miss hearing it), and French. Cambodian because I used to listen to a lady speak this quite often and liked it. Thai from listening to my aunt, uncle, and a friend speak it. I'm sure there's more but I can't think of anything else right now.
I'm not very well-versed in languages boyond watching foreign films and whatnot, but I'm not too fond of my own (Braz. Portuguese). At times it just sounds like the poor man's Portuguese Portuguese. Or the very poor man's sweatshop-made Spanish knockoff.
I like Spanish, Japanese and French. There's more of a melody there, I think. I also like English, despite its confusing aspects. Any language where the word "whereupon" exists can't be that unpleasant to hear.