The hitch is a double sided sword...If it has it the new owner will think the truck was a tow vehicle, but if it doesn't have one then the vehicle could be worth less.If you ever sell your truck it's just one more thing the new buyer might want to haggle over...
Not to get off topic but I have a Reese tow hitch on mine and I have been hit at low speed twice in the rear. Both times my hitch prevented any damage to my vehicle. One car (honda accord) had major damage to the hood and it didnt even crack my little factory reese hitch cover. It sticks out just enough so that small cars will hit it and not the bumper.