It is a good question. For me it's worth it when I feel "satisfied" about my purchase. Game can be short, but if it has replay value it's awesome. Good story can sometimes do that too. Best games however are those that are long and replayed over and over again. Destiny is going to last for 10 years? I just think that people had too high expectations. I have to say I have got my 60€ worth out of the game already. DLC? Well that's a different story. Seems bit low on content.