I only become the fan/follower of people whose Hubs I genuinely like reading and who I think create a really quality product ALL the time.
That said, I have far fews people I follow than who follow me. But I do try and check out the people who sign up to follow me.
Being asked to become someone's fan is a great way to get me to NOT become a follower. I want someone's Hubs to speak for them and be able to catch my eye that way.