Why doesn't Sony make all game features, such as in game music, party invites and game launching from HOME mandatory? Microsoft has been successful with Live in part because every game includes the same features. With the addition of trophies Sony should have made all features mandatory, so why don't they?
I have been a part of the PSN community since shortly after the PS3 launched. I got my PS3 in early December as an early Christmas gift to myself. I have never owned a 360 but I have played the 360 many times. I constantly hear people talking about features that Live has that the PSN does not. Sure, some of those features (Facebook and Twitter, WTF!?) are not essential to gaming, but they are features nonetheless. Although personally I may feel as if I do not need these features the community has spoken and many gamers want five primary features added to the PSN that are already available on Microsoft's Live service. Those features include demos for every PSN game, in game voice chat, a unified party system, in game music for all games and the ability to leave voicemails. The first four are more game related while the last one is just an extra option that would be more of a luxury than a necessity.