I always thought that the concept of the joined Trill was interesting. The idea of the symbiont living for hundreds of years through different hosts. It actually amazed me how different the hosts of Dax actually were, mostly because the idea was a blended personality of both host and symbiont. Like, even though we didn't exactly meet Curzon, we have a good idea of the kind of man he was, and then we heard some things about other hosts, even Joran the killer. Onscreen, we get Jadzia and Ezri, who are two very different people (and boy did Worf have a hard time trying to process losing Jadzia once Ezri arrived).
Something that I find fascinating is how the symbionts can live for a while with no hosts in those pools of mud in the caverns on trill. I mean, it's never said directly, but I would assume that this is where they breed or recover from illness or injury.
Less known is that a significant proportion of Trill are biologically capable of joining, and yet there are only enough symbionts for a tiny fraction of those to become joined.
In any case, the addition of the symbionts makes the Trill one of the more fascinating species of Star Trek.
Something that I find fascinating is how the symbionts can live for a while with no hosts in those pools of mud in the caverns on trill. I mean, it's never said directly, but I would assume that this is where they breed or recover from illness or injury.
Less known is that a significant proportion of Trill are biologically capable of joining, and yet there are only enough symbionts for a tiny fraction of those to become joined.
In any case, the addition of the symbionts makes the Trill one of the more fascinating species of Star Trek.