What always bugged me in Voyager was that the Doctor didnt get any story lines really exploring what he is. After he got his mobile emitter from the future, he basically was a near immortal AI made of light. He could still be around doing snarky remarks during the heat death of the universe. What a waste of story potential.

Rest in peace Bill Hicks.

“Given enough time, Hydrogen starts to wonder where it came from, and where its going.”