I was also waiting for the final season of Shakugan no Shana, but it has been so long that i don't have as much interest as i used to have. Of course it's still a favorite.
Mirai Nikki is one that i was waiting since long ago. Don't remember why, but it's one of the few series where i read the manga before the anime, and i really regret it now as now i'm not as impressed as i would have been without reading it (That's why i don't like to read mangas before the animes)
As for other series:
- Boku wa tomodachi ga sukunai -> I'm probably dropping it on the next episode.
- C Cube -> I know it's going to become a complete harem anime... and when it becomes completely obvious i'm probably dropping it.
- Chihayafuru -> At first i found ridiculous the game about reading poems, but the first few episodes have got some nice character developments, so i'll keep wathing it for now.
- Guilty Crown -> With only 1 episode watched looks promising but it's still soon to say.
- Kyukai Senjou no Horizon -> What i'm impressed with this series is that theres still no sign of cheap fanservice.... so i'll give it a chance.
- Last Exile -> Again, only watched only 1 episode, but i kind of enjoyed the first series. Hope this one is better.
- MashiroIro Symphony -> I'm probably dropping this one in 1-2 more episodes...
- Gundam AGE -> With all the latest gundam series i have watched i first enjoyed them and then become bored with them. This one will probably follow the same pattern.
- Persona 4 -> Loved it as a game. Don't quite see it as an anime. I'm probably dropping it.
- Un-Go -> Not much of a fan of these detective series, probably dropping it.
Series that i have already dropped:
- Maji de watashi .... -> Cheap fanservice anyone?
- Maken Ki -> more cheap fanservice? and why does this one remind me so much of a recent series i can't remember?
- Ben-to -> I find the plot quite ridiculous.... If it gets better please someone tell me.
- Phi-Brain -> Puzzles everywhere for everything? superpower to resolve puzzles? No thanks.
- Hunter x Hunter 2011 -> This one i dropped it because it's just a copy/summary of the original series. What a waste.
- Kimi to Boku -> Not my style sorry

- Chibi Devi -> I never liked those 5 minute episode series -_-
Besides all that, i keep watching Mawaru Penguin Drum from last season, not that great of a series but still watchable. I'm also following and enjoying the Towa no Quon ova/series (only 2 episodes have been aired and they seem to take a long time between each one). And of course i loved the Mardock Scramble movie. Can't wait for the second part.