Rather than say one way to bill is better than the other, I view this as situational. I've worked a fixed price project on occasion, but most of my work is hour

Rather than say one way to bill is better than the other, I view this as situational. I've worked a fixed price project on occasion, but most of my work is hourly. The approach is a result of the negotiation process. I also believe ethics is subjective. A consultant is running a business and has a fiduciary duty and a right to make money. If I can make money and keep the customer happy then all is good.