My true "heavy" hasn't shown up yet. I'm trying to have fun but be strategic to what it seems your tastes are. The next heavy round all bets are off. 
My tastes aren't that easily defined, really (as all my regulars will tell you!). Certainly they're less dependent on genre/overall style than I think most people. Melodic approach is a big driver. Certain aspects of performance (like vocal delivery) and production can also make a big difference, as can specific stylistic choices.
My RYM is hopefully reasonably helpful, although it doesn't explain why I rate things the way I do. If you haven't already you could also have a skim through the results from my v6 roulette especially, and to some extent my v7 although that was focused on older music. That's arguably a less complete picture but at least my write-ups give an indication of what speaks to me and what doesn't.
My v6 is here:
https://www.dreamtheaterforums.org/boards/index.php?topic=55161My v7 is here:
https://www.dreamtheaterforums.org/boards/index.php?topic=56863--------------------------
By the way, a bit of an aside that's not about the roulette but might be of interest to people. Earlier in the year I had a mini "project" whereby I dipped, to varying extents, into everything I'd previously rated lower than 3 stars (unless I did so recently) to see what I think now. I had quite a lot of ratings going as far back as 2007, and I've found a few occasions in my last couple of roulettes where I've been prompted to revisit something and found myself liking it a lot more. In the past I've gone through phases of being down on certain styles or genres, but the past few years that's not really been the case anymore and I'd judged a lot of things unfairly.
Anyway it was a really interesting and enjoyable project and I found a new appreciation for a lot of stuff I'd written off. In a few cases things jumped up above the coveted 4-star line. On the flipside there were some cases where I'd been far too generous to things that I actually find pretty unpleasant to listen to.

I might at some point extend this to things I've rated higher, especially in the 3.0 to 4.0 star range where I suspect there will be more of a mix between things I've been unfair on and things I've been too generous towards.
Anyway in terms of relevance to this roulette, I guess the key takeaway is that the things that are still rated low in my RYM, that really is what I think of them.