This season: Log Horizon OR Kyoukai no Kanata. Log Horizon probably goes a bit higher in the tier for me.
All time: Clannad OR Spice & Wolf. Clannad for the many feelings it brought to me (Also the only anime to have made me cry tears, most others just make me watery); Spice & Wolf for it's light, elegant and fun storyline and how it actually develops the protagonist's relationship at a healthy level and shows them actually caring for each other.
Clannad (aspecially After Story) will be probably my very favourite for ever ^^ But I seriously wish to see something that will touch my heart even stronger.
Bokurano is another one that I always think about when somebody talk about my favourite anime, but I still think that Clannad is this #1 :)
Sorry again for adding to the list, but you're the only one left with this. Please reupload when you have the time, thanks. みずカノ
Also, could you update this to Ver1.31? It wasn't listed, but it definitely got updated. 隷属と解放のラビリンス