I think I understand this a bit better now!
I never really saw the point of trophies that you get anyway during the course of a game, nor those that are so easy you get them without even trying. I think it was Assassin's Creed Brotherhood that had quite a few of those. Great game by the way- but trophies like 'sprint for 500 meters without stopping' are most likely to be achieved by accident. I know my reaction was nothing more than 'Oh. I got a trophy for that?'
On the other hand, Batman: Arkham Asylum has a far more fun variation since it requires thought- the 'glide for over 100 meters' (in one go, that is) trophy was fun because there is only one place in the game you can glide that far from, and it's up to the player to find it
Thinking of Abe's Oddysee, it would be interesting if there were trophies that could only be completed in a specific location, but without the ability to return to previous areas later on, people might not like having to play a large chunk of the game again just for a trophy if they missed it first time round.