Haha. Well, it depends what you mean by 'enhance'...
I tweak things like contrast and saturation (well, curves on photoshop) on anything I print.
I'm a photoshop addict, and I spend more time and effort in post processing than taking my pics, but I'm hoping that will change somewhat with a DSLR.
It depends what I'm trying to do. Some things are decidedly photography, while other are (I don't know if this is the right term) manipulations.
OK. So I guess I am an 'enhancer'.
As for iPhoto... I've never used it. I don't have/use Macs. Yet, anyways...