Anime to Collect

I have started to collect dvds/mangas and wish to grow that collection. Please don't suggest series that are longer than 50 episodes in length. I have nothing against long series (I watch One piece (600+ episodes)) but i am not rich. I am open to any genre, as i am not picky and like a little of everything. So far, my collection contains:

Nichijou
Spice and Wolf
Steins;Gate
Black lagoon
Baccano!
Hetalia
The Sacred Blacksmith
Haibane Renmei
All Hayoa Miyazaki films
Fullmetal Alchemist
Fullmetal Alchemist the Conqueror of Shambala
FMA: Brotherhood
FMA: Brotherhood the sacred star of Milos
Mushishi
Casshern Sins
Eden of the East
School Rumble
Hero Tales
Highschool DxD
Elfen Lied
Gunslinger Girl
Attack on titan
Clannad
Clannad After Story
Claymore
Black Rock Shooter

I also have plans to buy these Series:
The Future Diary
No Game No Life
Jormungand
Ghost In The Shell: SAC
Ghost In The Shell Movies
Girls und Panzer
Ergo Proxy
Wolf's Rain
Toradora
C-Control
Soul Eater
Trigun
Canaan
Black Butler
Tsubasa RESERVoir CHRoNiCLE
Blue Exorcist
Angel Beats

So if you have any great (shorter) series that i haven't listed, please let me know! :)
     ~Ephemurai  

I have watched and am looking to get Another, ToraDora, kill la kill, black bullet, and fruits basket. I will have to check out the rest. Thanks for the suggestions!