Now, this brings an interesting thing to mind... didn't you guys noticed how well Luke took the fact that Obi-Wan Kenobi - his mentor - the person he knew from the childhood, a strong link to his home planet - died from the hand of Darth Vader? Instead of saying in anger "this one is for Ben!" when he blasts a TIE Fighter, we hear only cries of joy "Haha! I got one!" (fortunately not "yippie!" or "oops!"

).
Ditto for the return from the Death Star trench run - not even one tear is shed for Biggs, his long-time childhood friend, another strong link to his home planet...

C'mon guys, this is an action movie aimed for young generation, not "Schindler's list"! Things come and go fast, ANH is the most "western-like" movie of all SW movies, somewhat closest to old-school classic sci-fi - it was in later movies (e.g. my fav ESB) where everything became more serious, meaningful, mature.