ตาถึง

Yes! It means you have good taste in choosing high-quality ingredients or great restaurants.

It is neutral. You can use it in almost any context, from a street market to a boardroom.

There isn't a direct single-word idiom, but you could say 'ดูไม่เป็น' (don't know how to look) or 'ตาไม่ถึง' (eye doesn't reach).

Yes, usually to mean someone has good taste in choosing a partner or a good eye for hiring talent.

No. For that, use 'ตาสวย' (taa-suay). 'ตาถึง' is about judgment, not physical appearance.

No. 'Picky' is 'ตาสูง' or 'เลือกมาก'. 'ตาถึง' is a positive trait of being discerning.

Say 'คุณตาถึงมากครับ/ค่ะ' (Khun taa-thǔeng maak krap/ka).

Usually, we use 'หูถึง' (hoo-thǔeng - ear reaches) for music, but 'ตาถึง' is sometimes used for the overall 'package' of an artist.

No, it's a standard idiom that has been used for a long time.

Yes, if a child picks a very high-quality toy or book, you can say it playfully.

It is a rising tone. Your voice should go up at the end.

Not necessarily, but it implies they have the 'taste' often associated with being well-educated or refined.