I loved that scene where he passed, even if Ecklie tried to break it up, after that, that talk with Grissom, that little mini celebration in the corner, it was just so nice to see, they knew he could pass but were just waiting for it..and how cute was that little bit when they sort of made him squirm a little when Nick told him that Grissom wanted to see him.
I think where Greg is so intelligent, what he was doing, while interesting, can also get boring, I know I get bored doing the same thing over and over, no matter how interesting, after a while you've done it so many times you can do it with your eyes closed, it's the challenge I like, and I think that was what it was with Greg, he sort of wanted a challenge, wanted to use his brain more, wanted to be more involved and especially wanted to be more part of the team.
While he doesn't fidget as much, being a CSI is more, how can I put this, he had more freedom in the lab, while being a CSI, it's more sort of straight-laced, not to say he still doesn't totally have his Greg moments..like in "A Bullet Runs Through It" having to document all those bullets..and that line about how Grissom 's power of observation sort of freaks him out sometimes..and then "He said skid marks." I love those moments.