I have both the D5100 and the D3200 and use them interchangeably. The operating interface of both cameras is quite similar. The resolution of both cameras is very high and for normal size photos nearly the same. I like the articulating LCD and use it very often when the camera is mounted on a tripod and when I use LiveView to focus my manual focus lenses. I don't shot video or use any of the P&S modes. I like the size of both cameras for walking around with just the 18-55mm VR lens and maybe the AFS 35mm f1.8. I have no problem at all with the auto focus of either camera. I would not like to give up either one but if I had to make a choice I would keep the D5100. Since I don't need to make a choice I'll keep both. Considering the picture quality and the low price of both cameras they're both a bargain.