The D3200 delivers solid quality images and relatively artifact-free noise reduction in its JPEGs up through ISO 400. Where many manufacturers choose to agressively blur rather than have color noise, Nikon favors the opposite approach. As a result you see quite a bit of color noise as low as ISO 800, but it retains more detail than its cohorts through ISO 3200. That said, I probably wouldn't shoot JPEG above ISO 400.
This is just an example of the reason why you should rarely use multiarea autofocus: it never focuses on what you want, in this case, the center of the flower. Otherwise, the D3200's full auto mode isn't bad.
(1/125, f5.6, ISO 320, AWB, pattern metering, 18-55mm lens at 55mm)
You can see noise artifacts even when scaled down to 50 percent, but it looks good displayed smaller than that. I couldn't get a better version by processing the raw -- just one with less noise, but not as sharp.
(1/80, f5.6, ISO 800, AWB, pattern metering, 18-55mm lens at 46mm)
I wasn't terribly impressed with the video quality from the D3200. It's OK for personal vacation-type use, but even in good light it's fairly soft and there are a variety of annoying edge-based artifacts (look at the seat of the chair on the right). In dim light it's quite noisy.