Probably mostly due to the fact that I played a 360 and unlocked achievments long before I played my first PS3 games and earned my first throphy. Also achievements where better integrated into the 360 since every game execpt for indies had them since the launch of the console. On the PS3 there are a lot of early games that didn't have trophies and almost none of them got patched for them later even though it would have been super easy especially for third party games since they usually have the same achievements and trophies. Plus that you have to sync up your throphies is a minor incovience but as far as I know you no longer have to do that on the PS4.