HOW CAN WE KNOW A PERSON BETTER??

While having dinner with my beloved god-daughter just the other I just reliased there are so many things I still do not know about her. So how can one know a person better? Prior to this I did ask one friend this question and she responded by saying we need to spend more time with the person. But how much time are we talking? 1 year, 2 years, 10 years? what if you dont have that much time? If we are to use time as a measure then it should be quality time spent together against the lenght of time known.This is because a people might known each other for a certain number of years but hardly meet, whereas another person might know him/her for a shorter period but spent almost any other day meeting,doing things together. I suppose the later will know more about that person than the former. I figure(my opinion) the only way one can know about people by asking. I did just that. So What is her dislike and what she likes. With the little time we had together this is what I gathered.

Let me see if I remember them all. let's start with the dislikes first.
if I recall correctly her no no lists were:-
1. she does not like milk/milk products and so ice creams is not on her favourite list
2. mango except the green ones.
3) noodles,
4) sandwiches ,bread

what she likes

1)blended ices drinks
2)Spicy food, tom yam etc
3)lots of chillies with her food
4)fried chicken, kfc, kenny rogers are ok
5)all kind of fruits
6)fruit juice like orange, apple
7)chocolate from New Zealand, where else.(cos she spent quite a number of years there)

I am sure there is still much more I need to learn about her and I want to know so much about her.