Wow! Great-looking recommendations. I'm especially impressed that such a game exists for iOS and Android. I generally loathe cell phone games, but that one looks like it might be worth checking out. Not really looking forward to playing with a touch screen though.
To be clear, I never said Life Force wasn't a great game. Of course it is. That's not the point. It's just that there seem to be a lot of American gamers who grew up in the NES generation who consistently can only think of Life Force when asked to name a classic shmup. For instance, the Angry Video Game Nerd pretty much always mentions Life Force when reviewing a shmup. These are people who clearly haven't played many shmups, and abandoned the genre after Life Force. I love AVGN too, of course, but he's really not a huge shmup player as anyone can see from his videos.