Being told that you look a lot younger than your age, is it good or bad?

Today's topic : Being told that you look a lot younger than your age, is it good or bad?

If you are told that you look younger than your age how would you feel? Do you take it as a compliment or taking it negatively?
 
Today I was working as usual, and this foreign worker at my work place said to me, "Eh? Kenapa you ponteng skolah arini?" (Eh?Why did you skip school today?) I'm speechless, as this happened to me once before when I was in the wet market helping my mom carry the groceries she brought and this Chinese uncle who was selling fish to my mom asked why aren't I attending school like the other kids? I found out later that he thought that I'm 12, at that point of time I was 22. It happened again today, quite similar situation like the last time except I've upgraded from just being primary school girl looking to being old enough for secondary school which is good enough to make me happy for the moment. He got a shocked look on his face when I told him my age which is 24 (going on 25 in May)As  he and his colleague thought I'm 13, which is hilarious.

To me if you are being told that you look like you are 20 at the age of 30's  then that a compliment. If it's the other way round, like if you are not that old like early 20's and