[QUOTE=FineAlready;7662969]
My gelding is by Devil His Due (so Halo is three back in his pedigree):
http://www.pedigreequery.com/isleshowthedevil
Best horse I have ever owned in my entire life, and I’ve had horses nearly 30 years. That said, he would not be a good match for everyone. He’s smart, athletic, talented, and a very fast learner. He likes to be right, and he tries to do what he is asked. However, he requires a very confident handler and you best watch out if he thinks you’ve done him wrong.
He was, frankly, pretty terrifying as a 4 year old. It was a little more than the typical 4 year old defiance. He literally reared every single day back then, lol. I really thought I made a mistake buying him at times. Now that he is 9 and we’ve had time to work out our relationship…I’m telling you…he’s just the very best partner I could ever ask for, even if he is a bit of a badass. ;)[/QUOTE]
Mine is by Abaginone, so he’s a grandson of Devil’s Bag, grt-grandson of Halo… Sire’s dam is Oil Fable, dam of Cara Rafaela - who is Bernardini’s dam. Fairplay is behind her…
I first met my guy at Belmont when buying a small piece of him as a 4yo. He had a tall gal as his groom at the time, and she looked at me kind of crazy like - she was afraid of him.
He was sullen in his stall when racing. But I always had carrots (with tops!) in hand, and was allowed to get to know him. He’d polish them off, then return to his corner.
He had his last two winters while racing off in VA. Was still all business when returning to racing, but not a scary monster.
When he retired, he was just the best guy - smart - stays out of trouble. Think the down time in winters away from the track really helped him. But definitely not a puppy dog in your hands. Opinionated. The description of FineAlready’s above is very much like him now, although my guy still needs some more work/tweaking. Much of his moodiness was attributed to a possible injury. But once he had time off (too much!) and I got hold of him, he just got tougher the fitter he was. Bucking! For sure. Had to have a couple of CTJ lessons.
What he really DOES love is attention - that we all pay it to him, but not crowd him. He really does love people after all. Routine. And people. And turnout. 
Opinionated is the best word for him, for sure. But one other thing - boy, is he sensitive to your mood, your confidence. He knows the second someone gets on him and is wary of him. With certain jockeys you could tell he was a bit dejected if they weren’t tuned into him. On the other hand, he really gave his all for those who believed.
I just love him.