I like them as long as they aren't Bullet Hell, which I dispise. But that doesn't mean I'm very good at them. I was much better as a kid, but nowadays, I'd have a pretty hard time making it through stage 1 in most games.
My favorite series, Parodious, is also not exactly easy in that regard...
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/