I quite like Protective, though I'd still call it a lower-end trait; the bonus to archers is really nice on Emperor-plus Raging Barbs, the drill bonus for gunpowder is very nice, and the city-defense/walls/castles thing is nice when you have to desperately defend a city because you've overextended or just been hit by surprise (and if you've never been forced into desperate defense at the city gates, you're probably playing at too low a level).
Imperialistic, on the other hand...
The GG bonus kinda forces you into constant warring just for the sake of it, regardless of whether it's currently expedient or not, and it really favours a meatgrinder approach to warring, which is hopelessly inefficient.
The settler bonus is okay I guess, but for getting more cities up and contributing more quickly, I'd rather have other traits' "new city" bonuses, like Creative's quick border pop, or Expansive's quick granaries and extra workers.
I'd probably put both of them above Industrious, though.