Magnum was endowed with a rich assortment of personality traits, quirks, and preferences. He was an avid sports fan, not only of baseball (he was a lifelong Detroit Tigers baseball fan), but of American football (having been a former quarterback for the Navy, he evinced an intense fondness for the annual Army–Navy Game that often worked its way into plot lines), and during varied episodes he tried out for a professional football team, coached and played both basketball and softball, and participated in the Ironman Triathlon. Magnum regularly worked out on a surf ski and participated in local competitions, and enjoyed daily swims in the tidal pool off Robin's Nest.
Magnum was an Everyman in the sense that his lifestyle represented every man's dream: coming and going as he pleased in an island Paradise, working only when he wanted to, the almost unlimited use of a Ferrari 308 GTS and other luxuries, a miniature refrigerator filled with a seemingly endless supply of beer, interaction with innumerable beautiful women, and adventures with his best buddies usually on his own terms.
http://en.wikipedia.org/wiki/Thomas_MagnumAgent John Casey (born Alexander Coburn) works for the NSA. His cover is working at the Buy More with Chuck. He also has an apparent weakness for pretty red-headed spies.
While he has often criticized Chuck over the first two seasons with Chuck's new found abilities through the intersect Casey is showing signs that he actually is becoming impressed with Chuck... which apparently is no small deal.
One of Casey's hobbies is growing and tending to a bonsai tree.
http://www.imdb.com/character/ch0031769/bio