I truly enjoy this series (especially the mud wrestling). It's so nice to see Slytherin!Harry done well with a dash of nasty/evil. Of course, given where he came from, it's very easy to see how this Harry would develop (much more easily than canon Harry, actually), and you're doing a bang-up good job of writing him.
Hopefully, the muse will crawl on you and inspire you to write more in this series. I'd especially like to see the Third Task ("Like hell I'm touching that thing with my bare hands...are you mental?"), as well as more dealing with Umbitch, then sixth year Bumbles.