>>715639448 (OP)I don't like most of them. I feel like by the time I'm good enough to get through the final stages, the beginning stages will have long become a boring chore to play through. In a run n' gun or platformer or something, I can get through a stage I've mastered faster by taking more risks to keep it fun, but shmups proceed at a fixed pace.
I did enjoy the Touhou "photography" games, though, like Shoot the Bullet, because they're structured differently.