Trek as always falls when it comes to relationships. I honestly think it's the franchises single biggest drawback and something that makes it inaccessible to a lot of people. It's just way too conservative with the honey-snuggles.
Even when it did dare throw a relationship at you, it was like something out of a 50s stereotype.
When you get right down to it Tom and B'Elanna or Worf and Jadzia, for example, were both basically just Ward and June ... with ridges.
And really large cutlery.