I started the year with 4 roosters. I knew I had to reduce that number as I only had 13 hens this spring. It had been my intention to keep the BO as the primary roo. He was/is an imposing, beautiful bird with a very gentle disposition. Eventually he was pushed aside by Henry the Americauna roo. He is big, black and beautiful. After a slow start he took over as the dominant roo, Henry is the best roo by far. Protective of the hens yet gentle to all the young chicks. I would still have kept Dr. Phil as he had very good qualities that I desired in my flock BUT he was just too big and clumsy. He was litterally wearing out the hens. He was so clumsy mating that he often tore the hens skin. I regretfully sold him to a farmer who had lost his only roo and was looking for a replacement.
In my opinion Orpington roos are a very good choice if you have nothing else to compare them too. If you are having only one breed in your flock then a Orpington roo is a very good way to go.
I have a mutt flock of meat birds and wouldn't have it any other way. We enjoy all the colors and variations. Makes life all the more interesting. Also you don't have to worry about inbreeding near as much.