The benefit of enabling transparency effects isn't just that it adds to the aesthetics. Though that surely is a factor, but the effect allows you to glimpse what is open behind the window. As for aesthetics, the translucent taskbar and interface were the USP of Windows since the launch of Windows 7. The benefit of disabling the transparency effects is that it improves system performance. For a system with low RAM, it is advisable to disable the transparency effects.