I'd be lying if I said that I didn't miss looking out over the hoodscoop of my '97 Outback Sport.
That said, when it comes to hood scoop, I'm of the opinion that if it's not functional, don't do it. If you don't have a turbo and an intercooler, it's strictly a "looks cool" mod and a great way to get your engine compartment extra dirty.
For spoilers I have a bit more leeway. The STI spoilers are too much for my taste. To big, too in-your-face. Way more attention than I need.
A WRX spoiler though, I can see that if it suits your tastes. For sedans though I tend to prefer the wingless look.
Also, NA Impreza overseas come with all sorts of things (wings, skirts, lips, diffusers, signal mirrors, etc) that only the WRXs or STIs come with in the US. I think that the exceptions to that are the scooped hood, and the STI wing. Those only appear on a turbo'ed car or on the STI. I see that as another guideline as to where to draw the line for me.