Blood Bowl is crazy fun, but it will also make you cry unless you play those percentages. I was certain the AI was cheating for the longest time - I'm still not entirely sure it doesn't. I lost track of the number of disastrous double skull rolls I've had in "can't-miss" situations. Once I started playing the percentages I started actually winning games.
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” - Mahatma Gandhi