There's a time and a place for everything. Often this place is not Twitter.
Twitter is a place where you can post little blurbs of what you are doing, where you are, where you're going. A place to say something about things and to people if you must. You can chit chat on twitter.
Keep in mind that whatever you write on twitter will possibly be read by your following. That following could form an opinion not just about that particular tweet but also about you. It's fine that you don't care about that. But take the concequences.
To keep it short and simple: Enjoy tweeting, but tweet responsible.