For contrast, I'll suggest something like Bakemonogatari. The fanservice is above and beyond what was necessary for a light novel adaptation; whatever was suggested in the source material, there's no need to highlight it so much in the animated adaptation. In your face, slow-mo panty shots? Check. An episode devoted mostly to a character parading around in their undergarments, dressing and undressing, drawn in loving detail? Check. Questionable areas for camera focus? Check. Main character who's constantly leering and much too interested in underdeveloped females? Check. Drawn out, close-up pans of over-exposed loli flesh? Check. (Wow, that sounds so much worse when I list everything.)
However, I never had the impression that Bakemonogatari was actually about its more skeezy qualities. The production staff, if anything, were having a little too much fun. As overworked and underpaid as they are, they'll typically get away with what they can... especially at Shaft.
The supernatural and horror-inspired plots were excellent. The dialogue was witty and clever. Indeed, there was mystery, suspense, surprise, and sufficiently brutal fighting. Constant humor, too - I was always amused. Some of the fanservice played into the comedy, and most of the rest was at least relevant to the plot in some fashion. If there's anything wrong, it's a matter of degree.
Even though the studio had its usual production problems in the form of missing scenes in the broadcast version, the completed visuals are pure eye candy. Frame after frame is styled with strong 2D design and a wonderful sense of color. They've outdone the graphic qualities present in Sayonara Zetsubou-Sensei, the two seasons of ef, or Maria+Holic, and the results are coupled with a more consistent appearance. There's far more to look at than fanservice.
Unfortunately, it's not finished, so Bakemonogatari isn't bound for any of our Top (or Bottom) 5's. The last three episodes weren't broadcast, and instead were saved for online streaming. Hopefully it doesn't turn to garbage at the end...
--Romey