Idea?

So I was not intending to write blog posts on Sunday, but I was struck with an idea so here it goes:  I had originally intended for races to have no bonuses that made them different. The only differences were going to be solely cultural, each race based on a specific culture or blend of cultures. NOW, I'm thinking about giving each race some kind of mechanic that would grant them advantage. Insanity in Hsif, blood lust in Dvergar, and maybe an added race. I'm interested in a rat-folk halfling variant BUT, it doesn't exactly fit with my campaign. Lots of decisions. But I do like the advantage mechanics.