I agree with bubba's critique. Decent looking guy overall. Love his dun points.
To register him or not, not a necessity unless you plan to show. Does add a bit to resale value and you do get a few perks. I just got a $500 discount on my new car from Ford for being an AQHA member.
He is cow bred a few generations back. Doc Olena, Peppy San both cutters. Doc Bar was known as a halter horse in his day and sired a lot of great cutting stallions. I wouldn't be surprised at all if your guy is pretty cowy.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.