what is your favorite hentai serie?

Taimanin Asagi was pretty intense. And since I haven't watched much more other than that, I'm gonna go with it.

Stringendo and its various stylish companions (Accelerando, Stretta etc.)

ANYTHING that's made by Mogudan, Udon-ya, and Happy Water....

My most recent favorite (in terms of hentai videos) is Kangoku Senkan.. it's really quite something, and I do very much love the level of detail in the animation (and the filthy dialog, fantastic).

1. Stringendo
2. Ikusa Otome
3. Taimanin Asagi

I really love Hentai too, downfall for me is that though i love it, im extremely critical of it and i end up liking virtually no hentai. If like me you want hentai purely for Good excecution and aesthetic qualities, you need not look further than this guy: Teruaki MURAKAMI
He's done some amazing shiat! Here Some of his best title include (From my favourite to least):
1:Kangoku Senkan (The production level on this Hentai is JUST UNREAL for a hentai, fuckit, even for your 'good' anime)
2: Dark Love. (Almost as good as Kangoku, mad production)
3: Princess 69 (nowhere near as good as Kangoku, but still good.)
4: He also made three spin offs for two characters from Night Shift Nurses.
: Ren Nanase
: Yagami Yu

My favorites would be:

Hatsu Inu: Strange Kind of Woman
GTS Viper
Bible Black

RAPE! RAPE! RAPE! need I say more. It was all about the rape!!!!!!!
Also Sex Taxi

bible black is really amazing and la blue girl.

My overall favorite Hentai series gotta be Bible Black and Words Worth.

As for Hentai Manga Secret Plot/Secret Plot Deep.

Angel Blade

maiden love love affair

Toumei Ningen

Videos, eh?

Fault!!
Kanojo x Kanojo x Kanojo
Oni Chichi S1&2
Floating Material

Bible Black (Really good story and the art is awesome)
Cafe Junkies (The animation is to DIE for!)
Triangle Blue (LOOOOOVE the art, I hate the story)
Kanojo x Kanojo x Kanojo (Just the thought makes me wanna go in my pants)
Lover In Law (Animation is awesome, just hate the fact that the guy is doing his brother's wife. Piece of shit, I hope he dies)
Inda No Himekishi Janne (Really hot xD)
The Pollinic Girls Attack (Soooooooooooo HOT!!!!)
Fencer Of Minerva (Wonderful story, really great)

Omg, I can't even pick a top three. They're all just so awesome.

mm...)//x -thinking- Well I certainly like all yaoi and I saw someone put "Boku no pico" but..but..err...I probably have one but I just dunno atm~gomen ahhhh someone I just saw someone put angel blade~xD I can say that is up there~

Kanojo x 3
Ojousama wa Ecchi ga Osuki
Boin Lecture
Resort Boin
Sora no iro, Mizu no Iro
Mizugi Kanojo
Tsuma Shibori
Aneki

all this are the hottest among my collection :D

note sure, i dont really watch hentai. I read it though.

My Favourites are:

Mizugi Kanojo
KanojoxKanojoxKanojo
Resort Boin

They are definitely 3 series that are on the list of must watch! :3