On my return to HSV from the north today, (2-2 mile parallel runways), approach gave me "make left downwind for 36R," I read it back but was wondering if I would overfly the western runway or split the two on my downwind. A few minutes later I got "Nxxxx make right downwind for 36R." At that point, with ATIS saying winds 080/5 I asked for 18L. Approach said negative and short time later had me contact tower. As I puttered in looking at the 2 mile long runway and thinking I'll make my turn to base about halfway down, Tower comes on and says "Nxxxx cleared to land 18L." A quick side step and power reduction and I was on final. I asked for the winds and got 160/8. I thanked them for getting me down quickly. While I was putting the plane away they continued to use 36L and R because it gets the planes to the terminal faster and the winds weren't that bad.