I think he's adorable. I love NSH's (not as much as I love full Arabs though! Haha) and I've never met a chestnut/sorrel gelding that was anything worse than a little dumb and due to his breeds, I seriously doubt he's going to be anywhere near dumb. :)
Just something I noticed, in that picture where he's saddled, the saddle's angle looks to be much too wide (maybe it's FQH bars and he needs SQH) for him. That's just something I'd keep in mind if you end up riding him in that saddle since a saddle fitted like that can definitely cause behavior problems. Hopefully they'll have a better saddle for you to try him in. :)
