I've never been one for character sketches, but M*A*S*H has such truly unique players that I find myself doing just that. Here are shorts written in first person for different characters, so I could get a better feel for their voices. ^_^

[I May Know the Word] (Corpral Walter O'Reilly)
Radar explains how and why he knows things before they happen.

[In Case of Emergency] (Doctor Sidney Freedman)
Loosely tied in with the episode "War of Nerves"-- the war teaches Sidney to help people even when they can't speak their problems.

[What You See From Where You're Standing] (Colonel Sherman T. Potter)
Potter must make a decision to placate both Frank Burns and the ghosts of his own memories.