If it makes any of you pre-dents feel better - I had a bunch of 3rd year internal medicine residents tell me this weekend they wished they had gone back and chosen dental over med. It all boiled down to lifestyle for them. They realized too late that it is taking them 3 years residency + 3 years fellowship to get to the same lifestyle we have right after graduating dental school.
Asian parents will get over it, don't worry. Just marry someone with credentials on paper even better than yours, that way your parents can brag about how great their new son/daughter-in-law is. My dad harrased me for a long time about why I didn't go to med school, now he just wants me to hurry up and get married.