Responding to es!
Now that I think about it, very often I like 'ships that inspire me creatively. There doesn't have to be a lot there, just a spark.
And I'm absolutely rigid on one thing--if it's a sci-fi 'ship, there's got to be something sci-fi about it, else what's the point? Interspecies relationships, a human and a former Borg, couples from different times...