You can easily check how many games (XBL or Retail) you've completed on your mygamercard page. I always take a quick look just to see how I'm doing. ;-p
Anyway, I prefer GS over Trophies. It's always nice to get that little pop-up especially when you've been trying to get an achievement (like when I was trying to get the final ME1 achievement just recently!)
Trophies just don't do anything for me, I haven't even sync'ed my trophies in several months (I have wi-fi turned off on the PS3). Some of the systems most popular games don't even support trophies (older ones, the most obvious example being MGS4). Maybe if Sony had chosen to do Trophies right from the start then they would have more relevance...
starcraft: "I and every PS3 fanboy alive are waiting for Versus more than FFXIII.
Me since the games were revealed, the fanboys since E3." 
Skeeuk: "playstation 3 is the ultimate in gaming acceleration"
