"Can you explain a bit more about not having full use of your system? Which apps would you like to run with root privileges?"
As a non-administrative user I can't access, change, or delete files on another computer in my LAN, or even on another partition on this hard drive. I can't change hardware settings. I can't create or reformat partitions on my hard drive. Those samples might be enough to establish the inconveniences of running as a non-privileged user.
The fact is that most of the people of the world run their computers as root, including those with a number of popular Linux systems. I'm a grownup, and I choose to take the risks associated with administrative use.
I hope no one will tell me that I'd better not use PCLinuxOS, because I love its reliability, speed, and style.