There have been a few people along the way that make the experience less enjoyable, particularly on twitter. You know who I mean: the people who follow your tweets hoping that you'll follow theirs. The ones that send a personalized message that is clearly scripted. Those who send several updates a day with a link to their website hoping to drive traffic. I quickly remove them from my contacts, but in doing so I usually notice something disturbing: they have thousands of followers! Thousands of people who are bombarded with spam from their "friends" because they are trying to make new contacts.
I'm currently following 6 people on twitter. Only 6. But I find them all interesting, and I enjoy getting new tweets. I only have 34 friends on Facebook. But I know most of them personally, and I love seeing how life is treating each of them. I follow 15 blogs, and I look forward to new posts appearing in my reader (a list of the blogs I currently follow is on the home page).
I purposely keep all of my social networks small so I can manage them. I keep them small so I can be more social.