Motorola has done a great job with the camera on the Nexus 6. The wide f2.0 aperture and fast shutter speeds and camera response times make this a great point-and-shoot camera replacement. With added features like HDR+, you can also get some great shots in unfavourable lighting conditions.
Any filtered images will be noted. I like to mix the Nexus 6 HDR+ mode with VSCO Cam filters for a cool effect.