Let's see...
I work out basically never, but I'm a a fairly hulking muscley viking thing "just because", I guess.
Fairly tall at 6'1".
My entire skeleton seems to be unusually thick and sturdy.
Never broken a single bone, despite getting launched from cars onto the road, falling from stupid heights, and hurting myself/almost dying in all manner of different ways.
I have a form of heterochromia where my eyes are blue with gold rims around the pupils.
I have Royal Toe/Greek Toe, which is real handy for using my feet kinda like hands and seemingly being the source of my amazing balance, but apparently it's the reason I put weight on the wrong part of my feet when running or walking.
I have loads of scars all over my hands and wrists, simply because I use them like wrecking balls and don't worry about hurting them.
Also have several other random scars here and there.
I have an extra vertebrae in my back.
I'm capable of a whole list of "1 in 10000 people can _____" type stuff. Thumbs that bend backwards, stupid tongue tricks, able to outright stand on my hands if I bend over with my legs straight, etc etc.
I had bright blonde hair when I was born, but now it's brown.....and my beard is redish...
I can bend just the last joint on every finger simultaneously.
I can pop almost every joint in my body without applying outside force, and many of them in alternate ways WITH outside force.
I have almost no sense of smell.
I can hum and whistle at the same time.
My left knee is kinda fucked up, as opposed to the years it spent very fucked up after I lost a fight with a fence and gravity.
Asumming studies have produced accurate statistics, my junk is quite large...but looks completely ordinary on my huge frame.
I have a powerful "death grip" that has stumped and annoyed master martial artists trying to use me as an example for training in how to disarm someone. Something I suspect might be a byproduct of just how I grip my steering wheel when I drive.
I'm balding pretty solidly, and I'm only 27 :/ Naturally the rest of my body has no such problem.
I don't sun burn. I flash fry. 5 minutes in the sun can leave me red.
I have great dark vision.
According to my friend, who makes/fits glasses for people as her job, everyone's face is slightly asymmetrical/lopsided in some noticeable way...except mine. She says that's super weird. Fine by me.
That's all I can think of...