As for pairings I think Archer and Hoshi should have gotten together.
Dude, I respect your opinion, but... Ewwwwwww (the age difference... Ew)...
Bogart was 25 years older than Bacall, and they were the loves of each other's lives. Love knows no age limits.
I think Hoshi and Archer had some great scenes together -- "Broken Bow," "Zero Hour," and that great opening scene in "Babel One" when she's teaching him to insult like a Tellarite.
I don't think Archer would have considered it proper to get involved with a member of his crew. But under other circumstances, I think they would make a sweet couple.