Are you the type to put down roots, or do you get restless after a few years in one place? When you're renting, it's pretty easy to pick up and move. Just wait for your lease to end, load up the U-Haul and hit the road.
Homeownership makes relocating a little bit trickier, though. There's no way to know how long it will take you to sell your home, and if you want to move soon, selling a house from another city or state can be incredibly stressful. If you're not planning to stay in one place for at least a few years, it may be a better idea to rent until you're more certain of your plans.