Here are some of my picks:
Ulquiorra Cifer (Bleach): Although Bleach isn't technically one of my favorite anime series out there, there is definitely something about Ulquiorra that makes me want to devour him (it's weird to refer to a cartoon that way, but they obviously did something right when they created this one). His cool demeanor and intelligence is the cherry on top. Besides, I can get tired of Ichigo's drama.
Vincent Law (Ergo Proxy): He's just nerdy enough to be endearing, and the inner torment and conflict with the other part of him who's the Proxy (the old Jekyll-and-Hyde or Dr. Banner/Incredible Hullk thing) and how they both have a weakness for Real is pretty seductive. It's less how he looks but more who he is that makes him kinda sexy.
Ditto for Kyoshiro/Kyo (Samurai Deeper Kyo)
Abel Nightroad (Trinity Blood): He seems pretty benign to the point of sometimes seeming like a goofball, but don't let that fool you: He is one serious bad-ass when he needs to be. That's what makes him delectable, that he doesn't need to act tough all the time to actually BE a tough guy.
Kamina & adult Simon (Gurren Lagann): Kamina was so swashbuckling, and Simon so tenacious (plus the constant "drill" reference wasn't too subliminal), and when they had the scene where you get to see both of them together as adults, I thought, now there's some nice, masculine eye candy.
Mugen and Jin (Samurai Champloo): Here's the Odd Couple of the anime world. Mugen is a devil-may-care misfit and Jin is distant and cerebral. Two great tastes that taste great together.
While we're on pairs, there's Lelouch and Suzaku (Code Geass): Honestly, Lelouch is too perpetually pissed off and brooding to keep my interest, but Suzaku's sense of duty and strong moral convictions make him irresistibly lovable.
Hagi (Blood Plus): He may not be as much a pretty boy nor as pretentiously romantic as the chiropteran Solomon, but his timeless, unquestioning devotion to Saya speeks volumes above Solomon's preening endearments.
Kazuma and Ryuho (s-CRY-ed): They spent most of the series kicking the crap out of each other, and they looked very good doing it.
Kiba (Wolf's Rain): Transient soul, the Lost Boy you want to take home with you.
I think that's a decent sample of the anime hunks I adore.
