Accepting a visual approach is hazardous especially in the US. The reasoning is not because I cannot see the runway nor unfamilarity. It burdens you with maintaining visual separation with other traffic and having the track miles to touchdown drastically reduced, sometimes increasing the workload considerably. Keeping visual separation at both LA & SF airports with parallel runway operations with VFR and IFR traffic that have widely differing approach speeds is not a challenge I need after flying all night. I stand by what I said in that never declare visual to ATC, at least not until you are fully established on the ILS.