I did it for the 'look'. As the advertising says, it will give the truck a "bolder stance" !!
Next, it is easier to fit a larger tire (taller) with the extra room the leveling kit provides. With the 2" leveling kit, you should be able to fit a 33+" tire.
My 4X4 truck came with the 275/18 tires and I am going to go to the GY DuraTrac @295/65R/18, which is 33.10" in diameter.
With a leveling kit, vs. a higher lift kit, there is not the radical change in vehicle suspension geometry. The ride is still basically OEM.