What I learned about them, I liked. But it also seemed that the liberal line was not entirely correct, for it was obvious that racial differences went far beyond skin color. It would be difficult to categorize all the distinctions I noticed. In fact, I made no effort to catalogue them at the time, but their differences ranged all the way from physical characteristics to more subtle differences such as extreme aversion for work in cold weather. On cold days, when I felt invigorated, my black co-workers seemed lethargic.