I've added two new reviews: the 1962 John Frankenheimer film The Manchurian Candidate and Steven Spielberg's 2002 Catch Me If You Can.
So why do I do so many reviews after the fact? Well, I do them when they are out on DVD, for one thing (though I don't often comment on the DVD aspect). For another, I like older movies, many of which have few reviews available on the Web - at least not as many as new movies have. While I do reviews of new movies (new when out on DVD), everyone else does reviews of them as well and while I may occasionally have some interesting comment to make it's not as if I'm adding anything new to what everyone else is writing.
Finally, if you look at my comments on Catch Me If You Can you'll see that first impressions are not always the same as second impressions, especially when those second ones come after viewing a movie some distance from when it originally comes out.
Hope that made some sense.