An estimated 2.8% of my DNA is from Neanderthals.
So what, I'm a caveman?
Actually yes, but that has little to do with the percentage of Neanderthal DNA in your genome. Our perception of Neanderthals as big oafs is clouded by our own notion of superiority and pop culture caricatures. How we are different and why modern humans survived and Neanderthals didn’t is still mostly a mystery.
What does this really mean?
There are many intriguing theories about what traits the smidgen of Neanderthal DNA may have imparted on modern humans, but we don't know yet if having a little more than average Neanderthal DNA could explain why someone is extra brawny, short or boorish. Those traits might just be regular human characteristics.
Source:
https://www.23andme.com/you/labs/neanderthal/