D.Gray-man is probably first on my list of Anime I wish to continue. They have some material to animate (about 8 volumes), but now that the manga is also on hiatus it might take a while before they start things again. I just about loved everything about it. : < Even some of the fillers.
Other series include Saiunkoku Monogatari. The light novels were completed a while ago, but the way the anime handled some of the characters' backstory makes it hard to animate the novels following the stop of the anime, which are heavily focussing on Kouyu's backstory.
Shounen Onmyouji is another one of those light-novel based anime which I would love to see more off. Although the ending is nice, it's far from satisfying and a big cliffhanger at that. Gurrrreeeennn
Karneval, Kamisama Hajimema****a, Pandora Hearts (restart and do it well this time, the original anime ending was bad), Rurouni Kenshin (I want to see the Enishi arc animated... properly animated. Seishouhen wasn't bad, but the manga is still better).
Yeah, I have some series here and there that I miss watching.
On a side note, I know the finale of the second season aired just two months ago, but I'm one of those fans anxiously awaiting Uta no Prince-sama Maji Love 3000%. |D At least there will be a special-themed OVA in December.