I made a few changes to my list.
anime :
1#
Strike Witches(both seasons)
2#
Kodomo no Jikan(both seasons)
3#
Welcome to the NHK
4#
Yuru yuri(both seasons)
5#
Mahou Shoujo Madoka★Magica
6#
Steins;Gate
7#
Hellsing:ultimate
8#
Spice & wolf(both seasons)
9#
Kaiji(both seasons)
10#
K-on!(both seasons + movie)
11#
Gosick
12#
Tengen Toppa Gurren Lagann
13#
The Disappearance of Haruhi Suzumiya
14#
Gunslinger girl.
15#
Baccano!
16#
FMA:B
17#
Toaru Kagaku no Railgun
18#
Darker than Black
19#
Akiga
Manga :
5#
Its not my fault i'm not popular!
6#
No railgun.
I'm going to read the gunslinger girl manga now, so my top 10 manga might change.