I prefer shoes. I had a friend come out to visit that used boots. Her horse actually did very well; however, in the time she spent putting on her boots, I was saddled up and ready to ride. I had to tie my horse to a post and sit in the shade a while.
Shoes. I keep fronts on 10 months out of the year when I'm doing serious conditioning. Sometimes I have to shoe all four for mountain rides.
I don't like boots. Too much time to put on. The fit has to be just right. I rode a horse who required boots once. It was a PAIN to get off on the trail and put them back on every couple of miles. I was constantly worried about those things. I don't trust them. My horse holds a shoe well, so I just shoe.