The best thing about sport utilities is the feeling of security they provide, the substantial weight, the high driving position with great road views, the 4-wheel drive for nasty weather. If you stick mainly to paved highways and live in an area with decent weather, a tire with passenger car characteristics with a little more grip would better suit your needs.
Stock tires are made for smooth highways, and lack many features that are necessary for traveling the off roads. You will want a tire with a tall, thick sidewall to resist punctures and tears and an aggressive tread pattern for increased traction when slogging through muddy roads and splashing through standing water. Large tread blocks, wide grooves and heavy siping promote efficient shedding of mud, gravel and other debris and water, and contribute greatly to traction in the snow, rain and mud. Taller sidewalls also provide more ground clearance.