Qualcom's Quich Charge 2.0 ("fast charging") is charging at the 1C rate (IOW, a 2550mAh battery being charged at 2550ma), which is the maximum recommended. Most phones charge at between 0.2 and 0.3C, which does make the battery last longer. But as JPC007 and Gator352 said, with the rate at which we replace our phones these days, it shouldn't matter. The 2 problems are heat (80 degrees F is about the hottest you should let your battery gt, and that's a bit warm - 68 is the ideal temperature for longest life [I know it's unrealistic, but we can't change the laws of physics yet]) and overdischarging. Don't let the battery drop below 40%, and you'll be getting rid of it with a battery with almost 100% capacity. (Let the phone shut off due to low battery every charging cycle and the battery will last 6 months - if you're lucky.)
Heat, discharge and water are really the only things you have to be concerned about. (And remember, leaving a phone out in the car all night in below freezing weather, then bringing into a warm house, causes condensation on every single surface inside the phone - it's almost as bad as dropping it into a lake. If you left it out all night, let it warm up slowly as the interior of the car warms up.) Also, don't leave it in direct sunlight - especially on the dashboard of a car. (You can actually crack Gorilla Glass 3 by doing that.)