TF3 was a great action flick just like the first two. Granted the 2nd one had major story issues, but as a pure summer action movie with an incredible cast of robots, its was well worth the ticket prices. I do think that having a good memory of the toy line and cartoons as a kid really pushes the movies along. I know TF were by far my favorite cartoon and toys.
However, TF3 won't hold that money lead for very much longer as soon as Harry Potter launches this week.
Also, I find it funny you blast TF when nearly all horror movies suck far worse in every way possible. There's a reason why no horror movie is anywhere near the top of the box office... ever. Their stories are just meh at best. The only horror-ish movies remotely interesting are the fake ones based on a true story.. lol.