I like people and everything, however, every now and then I really like spending time alone.
Me too. Spending too much time in isolation can lead to depression though
That is true.  However, there are benefits to solitude.  It allows for self reflection, inner growth and focusing on self concept
Yeah, as long as you keep your mind busy, any negative affects can be avoided
Then on the other side of things, there is the idea of solitary confinment, such as in prisons. I like solitude, but only when it is my choice
Yeah, solitary confinement is a pretty harsh punishment beyond incarceration 
Yes I would imagine being locked in solitary confinment would do a number on you mentally.  
Being isolated for that long can lead to anxiety and sensory illusions
Yes it can.  As well as paranoia and dellusians
seen as undesirable, causing loneliness or reclusion resulting from inability to establish relationships. Furthermore, it might even lead to clinical depression. However, for some people, solitude is not depressing. Still others (e.g. monks) regard long-term solitude as a means of spiritual enlightenment. Indeed, marooned people have been left in solitude for years without any report of psychological symptoms afterwards.
Enforced loneliness (solitary confinement) has been a punishment method throughout history. It is often considered a form of torture.
In contrast
thing to do ... I was dreadfully lonely; I was living alone in the desert and had been for too long, really, and I felt that isolation very severely after a while, and it's probably a version of self-pity, I'm sorry to say, to have publicly said something like that, but there it is, I said it, turns out I wasn't telling the truth – I didn't know it at the time."
In June 2007, Darla Records released two CDs by