I just recently started a campaign that I was not to prepared for so on the first day I just winged it. The players loved it and that is a rarity with my campaigns (I am not the normal DM). Usually when I plan my campaigns is when I get the negative feedback. So I was wondering if maybe I should just wing it from now on or should I put some thought into it? I really like making campaigns but I usually give them something to powerful or make them fight a monster that is to powerful. What should I do?