I don't care about trophies much at all, the most I do is check sometimes what trophies somebody else has on my PSN friends list or something. I only got some because of LittleBigPlanet and that seems to be it.

Nope, I love achievements.  Those make sense to me.  What doesn't make sense is why I'm a level 2 gamer, and what it takes to get to level 3?  Also, seeing a person has 42 bronze trophies, 25 silver, 6 gold, and 1 platinum doesn't mean much to me other than they've finished one game.

I simply like numbers better than trophies because I can generally get a better feel for how much that person plays.

Though as I said, I like platinum trophies because that directly shows you how many games the person has finished. Trophies in general though, I think are another wasted effort to try and copy MS.

You get a progress bar telling you how close you are to the next level, that's about all you really need in term of numbers...

eh,they are a bonus.They're nice to have.But most definitely not a necessity.

I'd consider achievements/trophies a bonus for me.

Nice to stretch out the replayability of something, but it's not going to kill me if older games don't get patched to include them (since new games in 2009 will be required to have them).