My quarab Sombre just passed away. I got him when he was 6 and I was 8, after my first mare was put down. Although technically Penny was first, I count Sombre as my first horse. He was around 15.2/ 15.3 (his withers definitely add some height there, they were pretty huge), and the hardiest little thing I had ever met- he could climb like a mountain goat, very good with his footing and very dependable. He had very good feet too, I never had trouble with them.
He was pretty much a 50/50 mix of the two breeds, temperament/ looks-wise, in my eyes- there was nothing 'really arabian' or 'really quarter horse' about him to me, if that makes sense...
He was ridiculously intelligent, had a tremendous personality, lots of spunk, but very gentle and kind. He was the perfect teacher for me when I was little, and the perfect friend as I grew up. He loved barrels and poles, never once knocked down a barrel, ran 16-17 seconds every time. I do believe every horse has one thing they enjoy the most, and for Sombre, that was barrels. He was very fast, loved to run. He developed a calcium build up in his right front knee, you can see it in the last picture of him grazing, and was retired.
All in all, he's my perfect horse, the 'once in a lifetime' guy.