I like the platinums as well. And the trophy sound better than the achievements' one too.
However, maybe because I mainly play JRPGs, I hate the fact that some incredibly masochistic and mundane trophy that would be 5 or 10 G hinders the platinum. Bronze/Silver/Gold are also often pretty random, with a lot of golds for story progression and bronze/silver for actually going out of your way to try to, well, achieve something.
Points can reflect that as well, on individual basis, but ultimately they pile up, while trophies always have that class system. There is the level with trophies as well, but hmm... level numbers always seem too low and moving too slow to me.
So, voted achievements eventhough I rarely play on the box nowadays and it's not even online.
