^^
But the races aren't mechanically similar to the suggested degree.
New Feat: Hmm ... you're sorta different ...Background: You are somehow different from the vanilla human. You may have a bit of demon stock in you, you may be a dwarf, or half-elf, you may just be amazingly tall. All that matters is that you're different.
You may pick some number of the below (4?):+2 to things that don't matter that much (saving vs. 1 status effect, little-used skills, etc.)
+1 to Hit or AC vs. a specific monster or group
proficiency with a few martial weapons, and even a couple exotic weapons that aren't too good
etc.
You may pick 2 of the belowYou may have +2 to one stat and -2 to another stat
+2 to saves vs. spells and spell-like abilities
darkvision '60 or low-light vision
+2 to 2 skills that are quite good (not UMD)
Partly, I'm against more rules when you can get away with less. Not to say that this is the perfect solution. It's just that if I take a race, I feel like it should make a significant mechanical difference, or none at all. (Actually, I feel the same thing about feats, classes, etc.). If not, then if I want to RP something, I can, but it certainly isn't necessary.
Frankly, if someone want's to play a dwarf as a human with a talent for things of the earth, I'm ok with that. Or vice-a-versa. Only that it should be clear.
Best
David