So, my biggest challenge at my last job was difficulty. I guess you could say difficulty with one of my coworkers. It wasn't noticeable. What was happening is the guy just came across as kind of rude and really blunt, almost shouting at times. I just had a hard time working with him, even though I didn't let that be known. The way I handled it was just going there out of killing him with kindness. I just kept going to his desk, striking up conversations with him. I ended up becoming friends with the guy and liking working with him.