He even said "I love the outdoors", much to the chagrin of the more city-like Di Nozzo.
Mc Gee has ostensibly used the profits from his writing to purchase a Porsche Boxster (seen in the episode "Twisted Sister") and an Armani leather jacket (seen in the episode "Dead Man Walking").
When Di Nozzo pesters him about it, Mc Gee replies that he has lost 15 pounds.
Mc Gee's weight loss led to speculation that Sean Murray, the actor who portrays Mc Gee, was ill; Mc Gee has a passion for jet packs, computers and enjoys playing games relating to tactical warfare and covert infiltration.
In the Season 3 episode "Probie", he was visibly shaken after killing his first victim, even though it was in self-defense and his teammates backed him in the subsequent investigation; when questioned about Mc Gee's guilt, Gibbs commented that Mc Gee "doesn't know how to lie".
His character was almost entirely altered by episode 6.12 "Caged", evolving into a bolder and more assertive character.