TOP FIVE!

Aaaah so hard to pick so I'll say for the moment as things change. Here's for anime, I don't read manga enough to create a list for that.

1) Sword of the Stranger [Movie]
2) Munto
3) Bakemonogatari [Nise, neko, all included]
4) Hellsing Ultimate
5) X

I'll start with anime:
1. Ouran High School Host Club
2. Hakushaku to Yosei (Earl and Fairy)
3. Gosick
4. Chobits
5. Ginban Kaleidoscope

Manga list (pretty much forced, cause I also rarely read manga):
1. Ouran High School Host Club
2. Heart no Kuni no Alice (the manga)
3. Hakushaku to Yosei
4. Akuma to Duet
5. Luna Lunatic

Luna wrote:I'll start with anime:
1. Ouran High School Host Club
2. Hakushaku to Yosei (Earl and Fairy)
3. Gosick
4. Chobits
5. Ginban Kaleidoscope

Manga list (pretty much forced, cause I also rarely read manga):
1. Ouran High School Host Club
2. Heart no Kuni no Alice (the manga)
3. Hakushaku to Yosei
4. Akuma to Duet
5. Luna Lunatic

Ouran is the best comedy I ever watched  

Hehex  ..as for me..  
Top Five Anime(Okay..this really Hard!  ):
1) Sket Dance
2) Arakawa Under The Brigde
3) Clannad After Story
4) Clannad
5)SAO (1st and 2nd season)

Top Five Manga :
1)Sket Dance
2)Fruit Basket
3)Aphorism
4)Pandora Hearts
5)Ouran High School Host Club
okay !Done!  
fuhh  ..It's hard..I feel guilty to any my favorite anime and manga.. 

Anime:
- Tokyo Ghoul
- Danganronpa
- Gintama
- Shingeki no kyojin
- Tonari no kaibutsu-kun

Manga:
- Kuroshitsuji
- La corda doro
- Alice in Heartland
- Alice academy
- 100% perfect girl(it's manhwa but manhwa is like a synonymous of manga so..)

1. Gintama 
2. Gintama' 
3. Gintama' Enchousen
4. Gintama°
5. Gintama Final Chapter - Be Forever Yorozuya


As of right now, which is obviously influenced by what's currently airing (though Gintama's been a fav even before the new series came out):

1. Gintama
2. Baccano
3. Fullmetal Alchemist: Brotherhood 
4. Noragami 
5. Daily Lives of High School Boys 

Manga is pretty much the same: 
1. Gintama
2. Fullmetal Alchemist
3. Ouran High School Host Club 
4. Noragami 
5. Are you Alice?

Manga:
Gintama, Gekkan Shoujo Nozaki-kun, Detective Conan, Working!!, Crayon Shin-chan (xD)
Anime: Nearly identical as above, except that Gekkan is replaced by Keroro Gunsou (XDDDD)