Most people are right handed, right legged (hop on left leg), cross their arms left over right and wear their watches on their left arm. If in doubt, go that way.

Meanwhile this is a WIP

McGee

Height: 6ft 1
Eye col: green
Hand: left,
Bat: right arm bat (Silk Stalkings)
Arms: crosses arms right over left,
Watch: right
Eye: right
Leg: right ? (chimera)

Abby

Height: 5ft 10
Eye col: green
Hand: right
Arms: crosses arms right over left
Watch: no watch

Jenny

Height: 5ft 5
Eye col: green
Hand: right
Arms: crosses arms right over left
Watch: on right

Gibbs

Height: 6 ft
Eye col: blue
Hand: right
Arms: left over right
Watch: left

Ziva

Height: 5ft 7
Eye col: brown
Hand: right
Arms: left over right?
Watch: left
Eye: right

Tony

Height: 6ft 2
Eye col: green
Hand: right
Arms: left over right
Watch: left
Eye: right

Ducky

Height: 5ft 7.5
Eye col: blue
Hand: right
Arms: left over right
Watch: left

Jimmy

Height: 6ft
Eye col: hazel
Hand: right
Arms: left over right
Watch: left


Notes
Gibbs wrote with his left hand in the plane scene of Blowback. McGee had the gun in his right hand in Sub Rosa because props didn't have a left handed holster.