Now, what I don't like. I don't like irrelevant and un-updated Twitter pages, that gets irritating. You don't know if you should follow or not because you don't want to miss out on what they have to Tweet about - but when you look them up, they haven't tweeted for months. Therefore, I decided that if a fellow Twitterer hasn't tweeted for at least three months, then it is safe to unfollow, and check back on them about three months later. I don't like spam, not the edible kind (that one is good especially fried). Some present themselves as followers but they are clearly robots. I don't like insufferable and insolent over-twitterers. They just take Twitter to another level. When a person gets that way, they really need to consider blogging or "facebook-ing" instead.
Having said all that, I will continue to use Twitter, and encourage others to give it a try.