Two things bother me. First, would you please say "imageboard" instead of "<whatever>Chan"? It's horribly awkward, and the tradition of naming imageboard something-chan is only western thing. The vast majority of image boards aren't named like that. The "chan" comes from "2channel" anyway, which has nothing to do with images.
Second, and this is just a pet peeve of mine, the words "hentai" and "ecchi". It's really only westerners who use these words to refer to porn. There's really no need to mangle the japanese language like that. We laugh at the japanese for their engrish, but it works the other way too. Using them as categorizations for how explicit porn is extra silly.