Not much if you don’t want to. We generally do not expect aircraft to maintain visual contact throughout the flight.
As PIC you pick your cruise altitude and make deviations from the flight plan as you wish. However since all pilots are responsible for maintaining separation, it is important that you communicate any deviations from the plan that you wish to make so that everyone knows where you are and when you will arrive at the next waypoint.
If we do happen to have a day with less-than-ideal weather or a flight in an extremely remote area or in challenging conditions, the Lead Pilot may, in the interests of safety, make some suggestions and recommendations with regard to flying arrangements.