taiwanese is a good language to taiwanese speakers because it has a good ability to express ones thoughts and feelings I think. but i also think it does NOT sound all that pretty in general.
my taiwanese wife spoke hakka fluently in addtion to taiwanese and mandarin. I didnt think she sounded the best in hakka, rather more she sounded the best in mandarin
So if your language has a lot of ɨ and or ʉ, probably not the prettiest language. Same goes for ɻ̩. Oh, and ɚ or ɝ. Sorry American English for that last one one. I still like it better than dropping the r all together and just lengthening the vowel. Still, ɚɚɚɚɚɚɚɚɚɚɚ, not the prettiest sound.
It’s just an acknowledgement of hearing or agreeing with something, like uh-huh. There aren’t even characters for them.
The actual way to write is probably hennh-ah (perhaps 哼啊 would be the Hanji), so what you don’t like is probably nasalized e. Technically both uh in uh-huh are also nasalized, and you seemingly have no problem with nasalized ʌ.
Don’t love nasalization myself, but when we are analyzing whole words or whole sentences, familiarity starts to cloud objectivity.
hennh–ah to me is associated with elders who are really fluent, and it may even be connected to indigenous languages, so when I hear people say it right, it just fills me with warmth.
That’s why I feel it’s more objective if we break it down to individual sounds.