This might sound insane to some, but I'm going to save "A NIGHT IN SICKBAY" next.
I've always been a dog lover, and an episode centering on Archer just staying with his four legged family member while he's sick is something many of us dog lovers have gone through. It's relatable because they are members of our family.
Also, seeing Phlox's menagerie of creatures was fun.
I get why a lot of people hate this one... it does make Archer look bad as a diplomat for much of the episode. But I can forgive this because it's Porthos. And he almost had one paw in Beagle heaven. (My wife absolutely loves that line.)
"SHOCKWAVE, PART II"
"MARAUDERS"
"THE SEVENTH"
"THE COMMUNICATOR"
"DAWN"
"STIGMA"
"FUTURE TENSE"
"CANAMAR"
"THE CROSSING"
"HORIZON"
"THE BREACH"
"BOUNTY"