What were some of the most difficult fights to score?

Which fights do you watch and can't really hammer down a victory for either guy? Or just confused on how to score the fight because it was so close. I found the Taylor vs. Hopkins saga very hard to score. Because these fights had very few exchanges and it's hard to tell what is and what isn't landing. Also Taylor vs. Wright was very controversial and I have heard both sides of the argument as to who really won.