I bred horses in the past and will be breeding them again soon.
I didn't go up on a breeding farm.
The reason I choose to breed in the first place was probably selfish, I had a real nice stallion and some mediocre mares. I figured "Why not?" I had good success considering my mares were not top quality and sold all the foals to good homes where they all still are today (I didn't breed on a large scale and still keep in contact with all the owner of my past foals)
The reason I'm choosing to breed now? Probably selfish still

I love quarter horses, love the breeding/managment aspect of horse ownership and love reining. I'm really not sure that competing in reining is the thing for me so I've decided to breed TOP quality reiners instead. I will still give competition a chance, but I'm not sure I will enjoy near as much as I will like running a small scale breeding farm.