Re: Your Opinion on Yugioh 5Ds.
Story-wise , it's the best written one among the Yu-Gi-Oh! series after DM.
Still, I prefer Duel Monsters as my fav. one. Reasons: The cards design, the summonings, the nostalgia factor, the novelty at that time, better humor and character interactions and so on...
5Ds didn't got enough merit: It's well-written, great plot, more humane mature characters, better love angle (Yusei x Aki leaves all YuGiOh pairing by miles), the futuristic angle, the dark sub-plots. Also, hats-off that it raised the bar high enough after GX lowered it down...Even if ZEXAL just did the inverse effect yet again.
As for Synchros, I feel it made the game better! And even if ZEXAL is terrible, I'm still for XYZ monsters. I think, they did made the game better and more fun to play. Perhaps, some feel gutted about the "new-gen" cards but honestly, for those who played with them, it's really great to strategise with them.