To be honest I can be a little to impulsive sometimes, I just dive in head first and have been burnt a few times because of it. In my humble opinion it is a double edged sword it means you are on things quickly and you don't miss opportunities but it also sometimes means you can be under-prepared which can be costly. I am trying to find a happy balance as I get older.
Sometimes I suffer "paralysis of analysis" and take the leap too late which I don't think is a good thing. I think you miss more by not taking the leap. Life happens fast and being able to take quick action is often good, especially if you are able to sum up situations quickly.