The first question I am asked when I admit to hiking solo is "What if you die?" My answer is "Then, I WIN!" Who wants to die in a hospital with a bunch of tubes in every orifice?
The truth is, I feel safer when alone. When I get tired, I rest. When things get sketchy, I turn around. No discussion with a partner, no guilt about being soft. No need to watch that my partner does not do something stupid. If I do something stupid, there is no one else to laugh at me.
In town things happen that are out of my control, when I am in the woods I feel confident that I can handle anything that happens. And I can ignore anything that is not really important.
Another plus is being freed from the Fashion Police. I can roll in the dirt, leave my top open if hot, choose clothes based upon function (or not even wear any!).
And there is no one to judge me because I do not match their ideal.
I see more, hear more, feel more of the world around me.
Then on the next group outing, I am more likely to appreciate sharing and less likely to whine about minor details.