You'd be surprised how many girls like Resident Evil or Survival Horror in general.
Outbreak was fun, it's biggest flaw was Capcom overreached itself and only released 1/4 of what they had planned. Overall though it's about equal to any other RE game in my opinion... think of it as a Choose your own adventure game RE style. Once Capcom releases File 2 (and hopefully 3 and/or a combined "giftset" it'll live up to it's true potential)
RE4 was fun, in fact I played it 7 times
But it's not Survival Horror in my opinion, not even scary. It's a good action game though. Action really isn't my thing, and if it wasn't an RE game I probably wouldn't have played it to begin with (now that I know what kind of game it plays like)
It was fun, but meh... not a fav.