Making human slayer, and GM is letting us use trait rules, so we get two traits. I'm taking the obvious Reactionary (Quick Draw, Surprise Attack should let me do early damage each combat). For my second trait, I was looking at the list of Social traits and saw 'Adopted'. Would that allow me to take the elf Racial trait 'Fleet-Footed', granting Run as a bonus feat and giving me an additional +2 to initiative? Can I really start with a ghetto Improved Initiative?
Trait bonuses don't stack with each other. +2 is the best you can get. Good options for human Slayer (that aren't Combat traits) might be something like Auspicious Tattoo, to boost their weak Will save.
No there is a difference between Race Traits and Racial Traits, Race Traits which you can select with Adopted are things like the Elves' Warrior of Old or Dwarves' Brewmaster not Racial Traits the things you get/can choose to get for being that Race like Slow and Steady, Human's bonus feat, or Keen Senses.
No there is a difference between Race Traits and Racial Traits, Race Traits which you can select with Adopted are things like the Elves' Warrior of Old or Dwarves' Brewmaster not Racial Traits the things you get/can choose to get for being that Race like Slow and Steady, Human's bonus feat, or Keen Senses.
Okay, cool. So I'll stick with reactionary. Where can I find these non-Racial race traits? Advanced Race Guide?
Archives of Nethys is my go-to for lists of traits, because of the easy Ctrl+F function to find what you're looking to boost.
You can find them in Ultimate Campaign and the Advance Players Guide, as Sunset said Archives of Nethys is a good place to look so is D20pfsrd.