Dog Days
Had I watched this show in 2011, it would easily have made my Top 5 last year. It was that good. It started out enjoyably cute and full of characters that had fluffy tails, but then turned into something unexpectedly awesome by the end. Someone commented on a different forum that this show starts off slow and then changes tracks midway through. Knowing that a second season did air did serve to dull the ending impact somewhat, but that didn't stop it from having a strong final several episodes.
I often find it disconcerting when a show saves all the ending material until the last episode and then rushes through it. I've seen far too many shows which fall victim to this and I don't know if it's just poor planning or what. Sometimes the show's ending is so bad that I'm not surprised they push it all to the last episode just because of how embarrassing they know it is. So it is rare when a show like Dog Days comes along and manages a surprise climax and still finds room for a fantastic ending and easily spreads the ending across 2 episodes without any problems even though it only had a 13 episode run.
The show had pretty serviceable animation most of the time though it also had some pretty derpy moments. Seven Arcs is known as the studio which animated the various seasons of Nanoha and so the fight scenes were quite enjoyable and if budget had to be sacrificed during non-fighting portions to give more attention to the many fights, then the studio made the right call. In general action was well-animated even as non-action was often still-framed. The character designs were all cute. Even the guys are cute. Even the guy voiced by Wakamoto was cute. Fortunately, they gave all the attention to the fluffy tails that they deserved, and they frequently wag vigorously and move with the proper momentum when their bearers are fighting or running or what have you.
I should give proper special mention to the voice work. For whatever reason, a massive number of notable voice actors lent their distinctive tones to this show. This show was so overstuffed with big names that people like Kana Hanazawa, Minako Kotobuki, and Norio Wakamoto were only able to fit in as relatively minor roles. The cast was led by Mamoru Miyano and Yui Horie and also featured Ayana Taketatsu and Yoko Hikasa reunited from K-ON in major roles. Nana Mizuki lent her voice to another major supporting character in addition to performing the OP, much to the chagrin of Ami Koshimizu who plays the main antagonist for most of the series. Yeah, this show's voice cast was hilariously stacked.
Ultimately, Dog Days actually worked out quite a bit better than anyone would have expected from it's derivative parts. The whole affair was a bit cheesy from start to finish but the combination of strong voice work, a surprisingly enjoyable story, a well-realized fictional world, and just enough pandering and fanservice but not too much combined to elevate the whole package to an unexpectedly high level. Fortunately, they were able to make a second season and not leave things hanging at the end.
Dog Days
Final Rating: 9 out of 10 Fluffy Tails
Fluffy Tail Ranking: (from Fluffiest to Just Fluffy)
Yukikaze
Brioche
Vert
Ricotta
Millhiore
Eclair