i change the height of my car all the time depending what wheels i decide to run, iv found the lower you go the worse the ride goes but its not that bad really
ATM I'm running 17's so daily driving would be pretty poor as its limited what i can drive over and speed bumps are a no no
i normally run 18's at the same height as above (10mm thread left front and back) and for me personally its fine as iv always had coilovers on my cars so am pretty used to the firmer ride