I find Malcolm to be the most interesting character in the show, because he is very much an enigma. I would have preferred the Enterprise triad to be Archer, T'pol, Reed instead of Trip. Though with Malcom's gloom-and-doom speeches and his obsession with military tradition, if anyone had to be killed off in the final episode, it should have been him instead of Tucker, simply due to all the foreshadowing. It would have also made all those Section 31 theories about what happened to Trip more plausible if it had been Malcolm.
I wish Reed would've been more paramount to the ship/show in the beginning. I like the idea of making him the third component to the triad.