Never be hesitant about going short. Looking at quotes during the day is very helpful. You only need to know if your price level has been reached. Staring at a screen all day is a waste of time. Gut feels should not be ignored.
Men often have intuition in the market that can help greatly.
Your gut feel has nothing to do with proper trading. Diversification across markets is always better than success in just a few markets. Sometimes one big trade could make the whole year. Diversification is wise, but don't ignore the opportunity that may come in one market. If you don't trade a lot you will lose the edge.