I'll be honest to all the hopefuls hoping for a K-On second season. K-On is very interesting, but there's one thing its very lacking in, and that's its story. Most animes that don't have a fixed storyline(meaning a story that goes somewhere) usually tend to be very short. I am not saying its impossible, but i say that its VERY unlikely. The Manga isn't very far either, just to note.
For me, i am still currently following this list...
1. FMA : Brotherhood
3. Senjou no Valkyria(Valkyria Chronicles)
5. Tears to Tiara.
Going to watch the following...
2. Fight Ippatsu! Juuden-Chan!!
3. GA : Getsujinka Art Design Class
5. Spice and Wolf II
6. Tokyo Magnitude 8.0
7. Umineko no Naku Koro ni
More to come...