I have a stock Razr Maxx, that I'm fairly happy with. I rooted my previous HTC phone in order to use some non-approved apps, but on my DRM, I can do everything I need to do. The only two things I'm annoyed by is that the home button doesn't take me directly back to my center home screen and some games & bloatware that I can't get rid of.
So other than the possibility of fixing those two items, is there anything else that I would gain by rooting? My only other complaint is that the phone has gotten really slow over the last month or two. I just cleared my cache and limited background applications to 4, so we'll see if that improves performance any. I don't know that rooting would improve performance all that much, but if it would then I'd do it..