I have mine rooted... On a day-to-day basis, there's no change at all. Still working fine, works the same actually. BUT I've rooted it to try new roms in it and than install a brand new rom in my other phone.
If you're thinking about changing it in someway, I say you could try to root.
If you're happy with it the way it is now, and doesn't bother about any change, just relax and enjoy it the way X10 is