I've been reading through the informative Gradius article on Hardcore Gaming 101 (
http://www.hardcoregaming101.net/gradius/gradius.htm) lately, and I noticed it judges every installment based on what new mechanics it brings to the series. A common complaint against most games in the article is that they're not innovative over the past titles. I've also seen this with lots of other long-running game series.
Lots of fans bashed the Igavanias because they didn't do much new. One of my favorite Silent Hills is SH: Origins, a title that received a lousy reception because it was mostly a retread of past SH's. But I don't see why that has to be a bad thing. I like Igavanias, and I would love to see more of them. I love the atmosphere of foggy Silent Hill, and Origins polished it up and gave me more of it. I don't care that Gradius 4 is covering mostly old territory; I love Gradius, and I can't get enough of it, so gimme more of the same, please!
There's lots of great movies, songs, and books out there that don't do anything new. Heck, movies haven't really done anything terribly innovative in the past 50 years, and look at all the brilliant films that have come out in that time! Why does something have to be new to be enjoyable? If you like
x, wouldn't it stand to reason that you'll like more of
x, maybe with a refined presentation, or a new setting?
So how important is it to you that a new installment in a series do something different? And why, or why not?