I learned to reverse into spaces in the military. That's the way that all military vehicles are supposed to be parked. I started doing this in my civilian vehicles and found that once you get the hang of it, it's absolutely the best way to park a car. Once you have the skill--and spatial awareness--you will find that it's much easier to get straight into a space with this method. Leaving the space is obviously easier, too.

I drive a large Ram pickup truck and backing in is pretty much the only way that I can park it accurately.