To necro a thread just to state that you're catching up....dude, I'm sorry, but that's kind of annoying. Seriously.
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I've been wanting to state this, but I keep forgetting. I've been ragging on Yuma since the first four episodes until the Robin and Cathy (who I love to death <3) episodes. I'm surprised about his growth in dueling compared to the first two duels he's played. His moves are smarter than his first attempts, and he's being more serious than playful. I can at least respect him for that.
One thing I like about him is that he's not the guy who always wins, like a prodigy like Yugi, Judai, and Yusei. He's the guy who always loses (offscreen).