I actually prefer working out in the morning as well. For one thing, it’s been proven that you burn more fat when exercising on an empty stomach. Studies show that people who exercise on an empty stomach burn 20% more calories than those exercising after a small meal.
That being said, the biggest benefit for me is a psychological one. If I accomplish a hard workout first thing in the morning and then follow it up with an intense cold shower, I feel like a warrior ready to take on my day. If I just sluggishly drag myself out of bed to make a cup of coffee, I feel just like that…a slug.