I've just added a few more people to the list of those I'm following on Twitter.
Here are my criteria for following people on Twitter, aside from finding them interesting:
1. Full name (if you've got a weird Twitter name - like @prgeek - then at least include your full name too)
2. Unlocked Tweets (if your Tweets are locked and you have to approve me to follow you, you need to get over yourself)
3. A photo where I can see you (but if you look like you want to, or even *could*, kill me, I'm not interested. Sorry)
I think that's it. See you on Twitter.