It may just be me, but it seems like many of the traits are far better for xenophiles or xenophobes, respectively:
Xenophiles:
- Intelligent and natural sociologist/physicists/engineers: These seems like they will apply regardless of how many species you assimilate and give really important bonuses.
- Thrifty/industrious: As above, just economy.
- Charismatic: This is sort of self explanatory.
Xenophobes:
- Talented and quick learner: This trait seems good for everyone... However, once an xenophile gets large enough, it will likely want to employ xeno leaders - meaning that the leadership bonus won't be used as much because it will only apply to members of the primary species. Since an xenophobe probably won't be able to use xeno leaders, it's not a problem for them.
- Adaptiveness and quick breeder: If your species will be the prime driver and suppresses other species, then being able to more easily colonize foreign planets and remain numerous enough that xenos can't easily overpower them.
Now, the counter to this is that: Will these traits only apply to where the species specifically works? Such as, will thrifty only increase the production of energy credits in tiles on planets where that species works? This being the case, quick breeder and adaptiveness remain extremely useful for the primary species.
Xenophiles:
- Intelligent and natural sociologist/physicists/engineers: These seems like they will apply regardless of how many species you assimilate and give really important bonuses.
- Thrifty/industrious: As above, just economy.
- Charismatic: This is sort of self explanatory.
Xenophobes:
- Talented and quick learner: This trait seems good for everyone... However, once an xenophile gets large enough, it will likely want to employ xeno leaders - meaning that the leadership bonus won't be used as much because it will only apply to members of the primary species. Since an xenophobe probably won't be able to use xeno leaders, it's not a problem for them.
- Adaptiveness and quick breeder: If your species will be the prime driver and suppresses other species, then being able to more easily colonize foreign planets and remain numerous enough that xenos can't easily overpower them.
Now, the counter to this is that: Will these traits only apply to where the species specifically works? Such as, will thrifty only increase the production of energy credits in tiles on planets where that species works? This being the case, quick breeder and adaptiveness remain extremely useful for the primary species.