Thanks 2WheelPhoto and everyone else!
I do like it, I'm just not used to it. I wear spectacles so it's an obstacle for me to see the viewfinder. I seem to prefer the LiveView more. I probably exaggerated the focus speed due to my impatience, but I'm pretty sure it's around 1 second. It keeps rolling front and back when I switch subjects (they aren't even 1 meter from each other). I'm probably spoiled but I definitely am grateful and did not complain everything, or did I?

Maybe I'm just a bit too serious. I actually preferred D5100 over D7000 for it's value for money (not planning to sell it) before my father bought this for me. I'm just trying to find solutions here. I think my "Never mind" is the cause of all this confusion, it was meant to say I'm okay with it, not grumpy. Back to my question, should I manual focus or autofocus since I have near-sightedness and I'm wearing spectacles?