I suppose it depends on how much you enjoy what you do. A significant proportion of my salary is made up of commission so I have a financial incentive to chase business and for me I would say that, on balance , I enjoy my job - say two days out of three - therefore I don't begrudge the time. On the other hand if I spend too long at work I do lose my appetite for it and it becomes counter productive so I guess there is a balance but if you are still enjoying it then keep saying yes. Maybe you will get to the point where you are saying yes but it will be employees doing the actual work.
It sounds like things are going well Nons so good luck whatever conclusion you arrive at.