Hm, I'll try 'em all. Been looking to get into Dirty Pair for a while (had some of it downloaded), just needed some kinda push. Kenko'll be nice, since it's been a while since I've seen a harem show. And Kyou will basically be candy.
DxD I've been on the fence about. I loved the ending theme- that's how I found out about the show, and I did see a pretty funny joke from it before, buuut...eh. Not sure how good the show actually is. And of course I'll give dick penguins a shot.
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EDIT - But it's not really so much that I'm looking for something that's good because it's borderline H so much as it's good and just happens to be borderline H. If a show like that exists. That was a good deal of why I liked Tenjou Tenge. It seemed like a generic Beat-Em-Up ecchi, but turned out to be pretty well done in terms of character development and story.
But I'm open to ecchi in general, too, not just borderline-H (that was just what popped into my head). It's just been a while since I've seen an ecchi which is...strange.