Re: FTL
FTL stands for Faster Than Light. :)
I don't like the idea of the currently active races having mastered wormhole technology enough to create their own wormholes -- the possibility of new pathways being established (expense notwithstanding) has too much of an undesirable ripple effect on the universe (where can they be opened? Can they be used as a weapon? etc.) You could limit them to particular points in a solar system (very special gravitational conditions), but then you might as well have limited stationary gates.
This is all mostly moot, since I intend to keep the campaign in one system (having star systems which only have one interesting planet each is as silly as having planets with uniform climate).
The precursor concept fits in with the seeding idea (which would allow for the existence of aliens which are only slightly different to us, in one or two interesting ways, as well as aliens who are vastly different). In general, having ancient, advanced technology which is used to a limited degree but not fully understood is a good way to introduce weird gimmicks which would potentially break the setting if people could use them in *anything*, but which are a desirable plot device in one particular place.
Re: Robot
* I'm happy with you playing a sentient robot, the only one of its kind (as far as you know...).
* I'm confused by "...now when ever my system is "rebooted" I am sentient" -- when are you not sentient? Do you gradually become less sentient until rebooted?
* Nanobot attack sounds like a promising origin story. Perhaps you were developed by AI researchers. Your brain was capable of improving itself, by rebuilding itself with nanobots, but since they themselves were limited by the technological sophistication of your creators, you were not expected to progress past the intelligence level of a small child. Then you came into accidental contact with other, more advanced nanobots (maybe your creators worked at a university, and a neighbouring experiment got loose -- many years after you were created and forgotten? Maybe your creators were military, and their base was overrun by aliens?) which remade your entire structure, including your brain, allowing you to attain sentience. Then you escaped (were you assumed to have been destroyed in the accident which ate half the university? Did the aliens let you loose, not understanding your worth)? Most interestingly, you could have had some or all of your memory wiped and have little or no recollection of how you came to be this way.
* The reason you haven't been carted off to be experimented on by the first person who saw you is that your true nature is not apparent. To a casual observer you look like someone with lots of cyber-prosthetics. If someone x-rays you, they can see you're full of metal and plastic components, but there are full-body cyborgs whose flesh has been reduced to a brain in a heavily shielded box, although they are rare -- and this is what you would pretend to be if someone pried. Only a full dissection would expose you.
* Maybe you wear a meat-suit over your metal body, and even try to pass for human.
* Maybe you've told some trustworthy people what you really are -- and maybe nobody knows the truth.
* If you've lost your memory, perhaps you have begun to doubt yourself, and sometimes wonder if you are just a delusional cyborg.
[nothing is final; delete/modify as appropriate]