I love hiking by myself. With that said, I don't usually do large trips by myself though in case something goes wrong. It's nice to have another person there to help carry things, figure out where to go on the map and help out if you get injured. Other like-minded people also can make the trip into an incredible adventure as compared to just another hike. Hiking alone can be peaceful and energizing but it can also be lonely at times. It's nice to have a someone to share a summit or view with.