In my experience, PC native shooters are completely worthless compared to arcade games. There's one I personally really like and would nearly put in my top 10, but it is an indie and objectively speaking a rather crude effort. Console-first shooters are generally nothing to write home about, but there it's still easy to find at least a number of decent and good ones, which is more than PC can manage.
- that and the fact that the PC probably has more Shmups than any other platform (in fact that's not even remotely a "probably"), we're upto our ears in them!?!?