I agree that water could have been portrayed a little bit better at points (I wasn't a huge fan of the water being on the ceiling because it looked more like jelly, rather than water...). Some parts were perfect. I loved the storms while exploring Silent Hill. That was a nice touch. I also loved parts where you waded through water to reach your destination. The water had some strong and weak points. The void was okay, and I liked the symbolism behind it, but it was a bit stressful at times to maneuver with it present (I had times where it would spread to another hallway adjacent to the one I was running in, so I would be taking damage and it'll be a good distance behind me). I also didn't care too much for the appearance of it, but it wasn't bad. I'm glad that the void wasn't the central part of the Otherworld, but rather a small element to it. One thing I loved about the Otherworld was that it gets longer and more disturbing as your progress through the game. There are many times where the Otherworld will look pretty much the same throughout (maybe a bit more disturbing in some areas) in the franchise, and I love that Murphy's looked like it was getting more disturbing as his story unfolded.
The characters were wonderful, as were their VAs. I loved how Anne and Murphy's pasts came together and she just wasn't there as some form of manifestation. She was a real person who was impacted by Murphy, and Murphy by her (in some form or another). I wish we could have learned more about Howard and DJ Ricks, but it's not a huge concern for me. I think Ricks and Howard's purposes were fulfilled for Murphy by the way those characters set examples for Murphy, and thus help him come to the realization of why he's in Silent Hill.
As for monsters, their designs weren't the best, but I didn't hate them. My only real peeve is that, though you can see their symbolism in most of them, some of them are a little bit trickier to distinguish. At the same time, this is also a good thing. It keeps us guessing, rather than having it handed to us. I liked some features of the monsters (E.g; the Screamer's 'wet' appearance, the Minion's manic expression).
In the end, you are correct, OP. We all have different tastes, and I pretty much stated all of mine. I guess I'm more of a story and characters type of girl, so Downpour was definitely a great game for me. I hope that in the future there will be more disturbances for those gore lovers out there, while keeping a nice story for us story lovers.