I'm looking for Ecchi manga with a strong lead, especially male. I'm a sadistic/dominant type myself, so I have a hard time reading those Ecchi manga with absolute weak and pathetic losers as male lead character, who are constantly abused by everyone. I want an Ecchi with a dominant male who knows what he wants, speaks his mind at least on occasion and does not accept abuse from anyone, especially a Tsundere who thinks she is entitled to abuse everyone just because she is delusional.
Mind you, I do not look for one of those shojo where the girl falls in love with a guy who practically rapes her and that's supposed to be romantic. I can't really give an example here because I have yet to find a manga I was content with. Nice art is a bonus here, Ecchi is about the sights after all.

Note that I will read manga, manhua, manhwa and everything, I just say manga for convenience.

The only difference between saints and sinners is that every saint has a past while every sinner has a future. - Oscar Wilde

Unbalance x Unbalance - seems to have the protagonist you seek, but it's not really an ecchi manga...

I think Trinity Seven: 7-Nin no Mahoutsukai fits what you are looking for. Its ongoing and comes out monthly.

Seikon no Qwaser
Second Trinity Seven

Sakuranbo Syndrome? He can be pretty dominant...

Ecchi with mature male leads:

• Mama wa Doukyuusei
• Boku no Bandai-san
• Hiiragi Shougakkou Love Club
• Blood Rain
• Seikon no Qwaser
• Kodomo no Jikan
• Yuria Type 100
• Virgin na Kankei
• Onii-chan Control
• Cherry x Cherry
• Minamoto-kun Monogatari
• Shinshi na Meets Girl
• Hishoka Drop
• Sense.

[img]http://i43.tinypic.com/351e59t.jpg[/img]

nana to kaoru may fit your taste. he is a bit of a loser usually, but when the s&m "breather" switch is flipped he is a lot more dominating. plus he doesn't really get bullied or anything, people just look down on him for being creepy... and he goes on fantasizing about s&m so its not like hes the annoying tormented pathetic protag xp.

oh... and AIKI i suppose..... tho there is technically rape its done off screen with only comedic reference.... and its not romantic rape... its rape rape... done by the protag.... to a chick he probably just gave a skull fracture... clearly a man that is fit to be a role model and should be admired xD. although its probably not as ecchi as you want, cuz it focuses mainly on fighting. despite that there is still quite a lot of fanservice, and a few explicit scenes. also he has the not taking crap from anyone in spades.... well except for one person but w/e

Few favs
Comedy:
Kyou kara ore wa!!, Mx0, Angel Densetsu, Skip Beat, Ai Kora, The Devil King is Bored

Romance:
Hana to Akuma, No bra, Shinigami Trilogy, kindan no koi de ikou, Usagi Drop, Threads of Time, Girl Friends

Most under rated:
Kindan no koi de ikou, kyou kara ore wa!.
m0r l83r... maybe >_>

Tsuki Tsuki! maybe