Problem with Trophies is they aren't very well represented. I mean there's 3 tiers of trophies, but if you don't know anything about PS3 you don't know what the trophies even represent.
Gamerscore is simple, and I wish Sony had just made theirs a number too. If you gonna copy something, at least copy it right!
I agree with Travis, especially about the copying thing. Microsoft has got this gimmicky kinect thing that everyone says doesn't really work that well. Sony has move, which is just a blatant ripoff, but it has the functionality to be what the Wii was promised to be.
If you're going to rip someone off, be a man and copy it outright.