Some guy named Dan Meth (I can't get that link to open, but that might just be the firewall here at work) made the above chart (click for larger size) defining (IHO) the quality of various movie trilogies, comparing the movies within a trilogy to each other and also allowing for the comparison of trilogies with other trilogies. A good idea, and it looks good visually, but I have an issue or two with it. I'm not going to get into his specific ratings (obviously, those are a reflection of personal taste, and I'm not in full agreement with all of his opinions), but here's what I'd like to see addressed.
First of all is the obvious fact that these aren't all trilogies. There are a heck of lot more than three Star Trek movies, for instance, and we all know how a chart of that series would look: mostly even-good, odd-bad. This would look interesting placed next to a chart of the Nightmare on Elm Street series, which follows the opposite pattern. There are also two Star Wars trilogies (although only one of them actually counts); technically, he should have labelled those 4, 5, and 6 rather than 1, 2, and 3. There were four Christopher Reeve Superman films (and you could have some fun trying to squeeze Superman Returns in there as well; would it go at the end, or between 2 and 3?), as well as four Alien, Indiana Jones, and Die Hard movies. I'm not sure how many Rocky and Planet of Apes movies we ended up with… And if you're going to include both Michael Keaton and Val Kilmer Batman movies on your chart, why not also include the Batman movies with Adam West, George Clooney, and Christian Bale? Seems kind of arbitrary there, methinks. Anyway, if you're going to call your chart "The Trilogy Meter", then you really ought to stick to actual trilogies.
Second, as the Elm Street reference above makes clear, there are several series that aren't represented. If I were making my own version of this chart (and don't think that I won't!) I'd have to drop some of the existing trilogies/series that I haven't seen (in part or at all) and add a few others. Poltergeist, The Omen, Evil Dead/Army of Darkness, Austin Powers – these are at least as well known as some of the series on the chart, and all of them are actual trilogies. And if I were to graph other series of movies, I'd definitely have to do one for the Highlander movies – just to show the second movie with a red bar in the negatives.
So what do you think – should I make my own addendum to this chart or possibly a completely new one, based on either my opinions or a polls of my friends list?