I prefer to either back in, or pull through, but in my case, its due to poor depth perception. I see the car on the driver's side, and think I'm like half an inch from hitting it, when in reality, I have tons of space. If I back in, I can judge the distance on my side by looking at the car to the left of me, and if I can pull through, same thing. I'm actually better at backing in, than pulling in, as I have trouble judging the angle of my turn into the spot, and many times have to back up a bit, and full forward.