Some questions about good Films- How is it that a film story, Dialogues-plot- match with Millions of Viewers ?

Films tend to play on people's emotions. KANK, Chak de India reflect the real issues or trends. Many of us have had similar experiences or have had similar feelings and hence can relate to them. So sometimes the characters or the plots bring out the vicarious feelings and other times they match some of our hidden fantasies (am referring to Koi mil gaya n its sequel).