I don't play Duel Masters. But I really enjoy the typical manga series from Corocoro-Comic and their anime adaptations. I can not compare this to the first season, as I didn't watch it.
"Duel Masters!" is the second season of the anime following Kirifuda Joe.
The drawing is mostly simple, the creatures are highly detailed 3D-animations.
This anime is enjoyable for its childish humor and the charakters allways being quite over the top. There seems to be a main story, but it does only show up on special occasions... The duels are fast paced, but not well explained. I actually skipped them sometimes, as I didn't really know what was going on and they were all quite similar.
I think that the this season has with "ジョー☆デッキ―!!!" the best opening of the Duel Masters series so far.
You should watch this anime, if you like colourful, funny series with everything being slightly over the top. If you enjoyed series like Bakutsuri Barhunter, Kaitou Joker or Youkai Watch, this might be something for you.
You should avoid this, if you dislike flat personalities, silly humor and total overacting.
This series gets 6 out of 10 dancing ramen bowls for being overall enjoyable but loosing potential on the duels.