summertomato, it's important to have some basis in a logical reality, but you don't have to be "right." That's what makes it an "opinion." Okay, if your opinion is that the world is flat, then you're an idiot (my opinion!) But if it's your opinion that kids would be better off limiting their TV diet to two hours rather than four, or no TV at all, then it's an opinion that probably has an arguable - but not necessarily proven - basis in logic or fact.
What really scared me, though, was the time I asked on QnA.live.com: Which is more important: fact or opinion? And the majority pretty much asserted that their opinion, right or wrong, was the most important thing. Okay...what if it's your opinion that kids should eat dog poop on a regular basis in order to strengthen their immune systems? (If you pretend to be an expert on child health and safety, you'd darned well BETTER be right. If you're anyone else, people are likely to simply dismiss you as a crackpot and a nutjob.)
More interesting to me, in an opinion piece, is WHY the author holds a particular view on the topic. What has led to the formation of this opinion? The more specific, the better. That's what makes it interesting. That's what distinguishes it from the sixteen billion other opinions on any really discussion-worthy topic.
crazzycool, are people STILL arguing PC vs. Mac? I thought they got tired of flogging that poor horse back in the 1980s or early 1990s. (Okay, never mind - the ads are fun. But the ads where Linux steps in and makes them both look uncool are the best. And I don't even use Linux.)