A problem with not having Facebook is that I cannot view photos of my friends, like if they have a newborn kid, or get married, etc... So basically, I cannot stay up to date on what's been going on in their lives. On the contrary, they can stay up to date on what's been going on with mine, through my personal websites.
And they don't even need to login to any service or network to see my updates... Because my personal website is not hidden behind a walled-garden.