In reality, a good session will contain a mix of whatever is required in the moment to accomplish the goals brought forth by the client. I don't typically do just deep tissue or just Swedish, etc. but instead listen to the request the client has made and then let my intuition and awareness guide me.
I firmly stand by the client's right to limit the maximum discomfort they want to feel. I listen to the tissue. I let the pressure be set by the response of the body to what I am doing. I am willing to apply as much pressure as the body melts under, no more. I love to ride that edge.