Lelouch from Code Geass, guy is such a joy to watch
Yagami Light - Death Note
Satou Tatsuhiro - Welcome to the NHK
Oga Tatsumi - Beelzebub
Uchiha, Itachi - Naruto
Madara (Niyanko-sensei) - Natsume Yuujinchou
Sinbad - Magi: The Labyrinth of Magic
Levi -  Shingeki no Kyojin
Nanba, Mutta - Uchuu Kyoudai
Saitama - One Punch Man
Revy "Two Hand, Rebecca" - Black Lagoon


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Tomoko Kuroki - Watamote
Saitama - One Punch Man 
My top 5 are:
1. Akashi Seijuro from Kuroko No Basket
2. Rem from Re:Zero
3. Akemi Homura from Madoka Magica
4. Hagita Saku from Orange
5. Kageyama Tobio from Haikyuu!!

I was going to mention Kurosaki Tasuku from Dengeki Daisy but I remembered that manga didn't had an anime adaptation yet.

Those who would make my top 10 (No specific order): Midoriya Izuku from Boku No Hero Academia, Saitama from One Punch Man, Aomine Daiki from Kuroko No Basket, Nase Hiroomi from Kyoukai No Kanata and Emiya Kiritsugu from the Fate/ series.
Luffy - Gon - Okabe are all my favorite when it comes to how can they make me happy and so glad just seeing them.

Leluch, Itachi , Jiraya, L , Shanks are my most respected characters as they show how life can be tough and overcome it .
I really love them all.

These are my favourite female characters so far (Rem, Christina, Nami, Mikasa, Mitsuki (Rumbling Heart), Homura, Taiga , Nagisa), all strong and dependable , nice inside)
Naruto Uzumaki, Minato Namikaze - (Naruto Shippuden)
Monkey D. Luffy, Roronoa Zoro, Trafalgar Law - (One Piece)
Glenn Radars - (Akashic Records of Bastard Magical Instructor)
Yukihira Souma - (Shokugeki no Souma)
Meisuke Nueno - (Jigoku Sensei Nube)
Kenshin Himura - (Rurouni Kenshin)
Dennis Kurama - (YuYu Hakusho)

L                           Death Note
Killua                     Hunterxhunter
Tsukki                    Haikyuu
Koro sensei           Ansatsu Kyoushitsu
Boa, Luffy, Law      One piece
Decim                   Death Parade
Nozaki kun            Gekkan Shoujo Nozaki-kun
Alice                     Shokugeki no Souma
Kanna                  Tamako Market
Makoto                 Free
Dazai & Rampo    Bungou stray dogs
Conan                  Detective Conan
Ichimatsu             Osomatsu san
Azusa                  K-On!
Mob                     Mob Psycho
Kakashi Hatake - Naruto
Sebastian Michaelis - Kuroshitsuji

I prefer the manga over the anime for both though.
Shinichi kudo - detective conan
Roronoa zoro - one piece
Saitama - one punch man
Yukihira Souma (Shokugeki No Souma)
Nakago, Tasuki (Fushigi Yuugi)
Tomoe, Kurama Shinjirou, Mizuki (Kamisama Kiss)
Kija, Jae-ha (Akatsuki No Yona)
Ryota Kise (Kuroko no Basuke)
Yato (Noragami)
Sunako Nakahara - The Wallflower
Kae Serinuma - Kiss Him, Not Me
Yūsaku Godai - Maison Ikkoku
Ranma, Shampoo - Ranma ½
Sebas-chan (Kuroshitsuji), Sawako (Kimi ni Todoko), Sunako (Yamato Nadeshiko Shichi Henge), Yue (CCS), Miyamura (Hori to Miyamura), Eiji (Bakuman)