Symbionts and Symbiotes in Star Trek and Stargate

I have been watching Star Trek: Deep Space 9 on DVD once again and my favorite character is Dax and the Trill in general. The way the Trill live their lives is more Buddhist in nature due to the many hosts that live to pass on their particular symbiont. The symbiont has its own brain and is capable of living a very long life that passes on the memories of each previous host to the next. The joining of these two separate entities is willing and even coveted by the Trill host with many years of preparation and training taken in order to be joined. In DS9, even though the character Jadzia Dax is only 28 years old, she also considers herself over 300 years old because of the experiences and memories from Dax, the symbiont. As a viewer, I enjoy the idea that my memories and life experiences could live on well into the future, unfortunately, I don't have a symbiont!
These peaceful symbionts are quite a contrast to the diabolical Goa'uld in Stargate SG1 who forcefully take a host and desire to conquer all worlds in the galaxy and make all humans their slaves. There are even different ranks of these evil symbiotes with the System Lords being the top ranked ones. The Tok'ra are a small group of Goa'uld who believe in only joining a willing host and help the humans fight their evil counterparts. The symbiotes of Stargate speak with a strange voice and occasionally let the host speak when convenient but basically control the host and make all decisions.
If I had to choose, I would be a Trill because the host is completely in charge of his/her life and uses the memories and experiences of the symbiont. So I could have the memories of a biologist, archeaologist, mother, father, son, daughter, well you get the picture; the experiences would be vast and unique.
I love that science fiction can make me ponder about the possibilities in my own life and how I can make my own memories and experiences as unique as possible.