Hahaha, I love the achievements actually, and they were well thought out.
I don't really think they're too hard to get, unless you're talking about Goldfingered or Silent Assassin, but of course I believe those are meant to be much more difficult. I also like the shocker you guys decided to use as an icon.
All in all, though I can only speak for myself, the achievements are rewarding, and I think the game is plenty fun without the achievements, though I love knowing that I have killed 500 people over all, or that I have killed 200 with flying remote mines, etc... It really adds a new depth to the gameplay.
See you guys on GE:S!