So it looks laggy at 30 when you are addicted to 60 fps.
Well, I have to say something here.
You don't feel the lag or choppiness at 30 because of the addiction of/obsession with 60fps but because of the fact that your monitor's refresh rate is 60Hz or above.
Also - lag is of two types - Input lag and the On-screen lag. For those of you who don't know what's input lag: Input lag is the delay in time between when you click a button and when up you see the object or subject on the screen react. With 30fps, in most games, you will witness an input lag if you're playing with a keyboard-mouse combo. However, things are completely different if you use a game controller. The on screen lag becomes more noticeable because of input lag. You will definitely notice the loss of responsiveness due to the way the mouse moves.