I mainly rooted so I could use my PS3 controller via SixAxis app. Other than that, I haven't done any major tweaking, since the tablet works great.
Rooting is incredibly easy though, it'll only take about 10 minutes to do so.
If you root are you unable to install OTA updates without breaking root? Been out of the Android game a while.
Also, anyone have links for any good cases for the N7? Are there any that will turn it on standby when you shut the case? Mainly need something that lies flat, if it can also act as a stand, that's a plus.