I find it interesting that people who profess to have no interest in others or think that basic interaction is a waste of time, still consider THEMSELVES interesting enough that other people should be happy to hear about them.
That isn't me trying to be funny, I really do find it interesting. It's all about ego and the re-affirmation of how we see ourselves. I have been 'lucky' enough to undergo two massive shifts in personality. When I was young I was hugely outgoing, very confident, sociable and pretty popular, I then had a bit of a 'nervous breakdown' which took me nearly 10 years to recover from, during which time I was an almost complete loner. Now i have a happy medium, I love talking to people, you can learn a lot from the most unlikely sources but you also learn not to be surprised, why shouldn't other humans have something important to tell you? It also feels good to just be nice to someone and pass the time.
Like limdis I also value my alone time very highly (as we all probably do), whether it be at the computer screen or going for a hike somewhere deserted, its made all the more precious by being in contrast with daily life.
But y'know it takes all kinds....
NB: imo having friends is really good for you, having someone to discuss opinions with, someone to bitch at, someone to draw inspiration from, get drunk with and laugh at is good for the soul. Just don't expect too much from someone, too many people expect their friends to be superfriends, to die for them and be there at the drop of a hat. Why should they? this isn't a movie and your friends have their own shit going on too. Just be thankful for what you got.
A wise man can learn more from a foolish question than a fool can learn from a wise answer.