Re: Archer, T'Pol, or Trip?
None of those three are actually my favorite.
I didn't get to see the entire series until this year. Malcolm became the character who was most interesting for me, because he keeps so much hidden. He's sort of the Illya Kuryakin of Star Trek, as Dominic Keating and David McCallum both tried to reduce the amount of information revealed about their characters.
Dr. Howard, Dr. Fine, Dr. Howard: For duty and humanity! --Men in Black (1934)