Twitter Followers: Quality vs. Quantity

I do believe that when it comes to Twitter followers, it's QUALITY over QUANTITY. While it is important to have a large following, what's the point of following someone who doesn't "tweet with substance"? I would rather follow those who actually have something interesting to say. Some of my favorite tweeters include:

@WomenInPR1

@DesignTwit

@MelissaOnline

@GoodGirlPR

@AnjeMiami

Since starting my "professional" Twitter earlier this year, I've gained around 30 followers. I haven't been as engaging as I should be over the past few weeks, but trust that will be changing!