I've noticed many houses are different depending on how many people are there and how big the water heater is. My mom's house would rarely ever run out of hot water. Three people could take a shower in a row and it'd still be hot. Daisy's parents house was the worst. If you took a shower, you'd did it quick because it'd only last about ten minutes and it was done. We ran out one time at our new house. That's one thing I do hate is showers that are not so cold where you don't already give up but not warm enough where it's comfortable. The first time I used the one at the gym in autumn I could never seem to get the water to be more than slightly warm.
Do you ever lose the hot water?