>Would you be using aperture priority with Auto Iso,?
I don't use auto ISO; I set the ISO myself. It's not that hard to change, and I don't want to give that control over to the camera. But I know that others use auto ISO to good advantage, so you'll hear different opinions on this.
> in C or S mode? release priority?
I tend to use C mode.
>For those also recommending one prime lens, which prime lens >would that be?
It's hard to pass up the 35 f1.8. Great lens at a good price. If I'm taking a prime along when I travel, that's the one.