As a longtime lurker here, who just recently registered as a member, I have to say that there's a night and day difference in following comment threads when you're logged in, especially in game threads. Before, when I hit F5 to refresh the page, it never consistently took me to the latest version. Now? With the alerts and all, it's slicker and smoother than ... well, insert your favorite metaphor in this space. I love it.
So if you're on the fence about registering, this is my two cents worth: it's definitely worth the minutes it takes to do so, whether you plan on commenting or not. And no spam in my e-mail either! A win-win proposition - and hopes for many more Tiger wins in the upcoming season.
Best to all!