I will start off small with anime/manga franchises that made a huge impact on me:
- Avatar - Legend of Korra was a little disappointing because it lacks character development.
- Bleach - Fullbring arc was a total failure (even some filler arcs was better), but Tite Kubo make up for it with 1000 year blood war arc.
- Code Geass - Pure perfection
- Death Note - It should have eneded with Kira killing the first L, second one was not needed.
- Dragon Ball - It's a great story, but the problem was those 10 episode battles just to realise that they are fighting at 1% of their strenght.
- Fairy Tail - Great story about friendship, great animation and great fan service.
- Fullmetal Alchemist - Only problem is that I don't know if I like better 1st or the 2nd version.
- Madoka Magica - Awesome anime, only downside was fight scenes with witches. I wish it was a little more bad ass.
- Monster - Masterpiece, simple as that.
- Naruto - Great character development, but main protagonist is just too moronic. I would like this show even better if it's about Sasuke.