Stop valves in the home

Should stop valves in the home for the toilet and faucets around the house be opened fully?
Besides a slower water flow what are the advantages and disadvantages of opening them only partially? What do plumber recommend?

For example if a toilet supply valve opened fully completely refills and the flow of water is stopped does that cause strain on the copper piping? Faster the flow greater the strain??

Thanks

Just open them all the way!!!!!!!!

When the water is not flowing, the pressure is the same if the pipe/hole/opening is 1/8" or 1". The volume you can flow will vary a lot. Basically, let the toilet fill up so you can have quiet sooner!

stops

All it does is control how fast things happen, but has nothing to do with "strain" on the piping. Once the valve or toilet shuts off the pressure stabilizes at whatever the city is supplying.

Also, for some reason, valves seem to be more prone to leaking when not in the full open or full closed position.

With just about any valve except a ball valve, when you open it all the way open, back off a bit so it doesn't "freeze" in the open position.

Rancher