After passing on shows like Smallville and Supernatural back in the day, I'm surprised how much I've been tuning into CW these days. I'm now watching Arrow, Flash, 100, and now iZombie. I also really liked last year's Tomorrow People. A few others I may check out on Netflix streaming.
With that said, Syfy has had some decent series of late, including 12 Monkeys, Being Human, Continuum (from Canada), and Defiance (which got much better in its second season). I know they still throw a lot of crap out there too, but I wouldn't watch every series on CW either no matter how sci-fi/paranormal it was, starting with Vampire Diaries.