I always feel bad when i dont follow someone who follows me. Particularly when they seem like a nice person.
Truth is if anyone follows me I always take a minute to read through your feed. If its about stuff I'd find engaging and i think we would have a lot to talk about I follow. Otherwise dont. But If I dont and you interact with me a good deal i often will follow regardless.
Just dont feed a bit on the light side, nothing person, I will always try to respond in comment threads regardless and engage.