What do you most value about WtW? I like the community---it's large enough to have lots of interesting work but at the same time small enough that I feel like I know each writer here individually. If you mentioned the username of someone here, I would know who they are and what their writing is like.
What would you like to see WtW do differently? I wish that the policies were less strict. The whole thing about not being able to publish about suicide, self-harm, gore, rape, or other mature issues should be revisited. I think the website could benefit from a tagging system. You apply various tags to each of your pieces to forewarn the readers of any mature content.
I also want more badges (although not all of them, see below). The first twenty (with the exception of perhaps Bestseller and Master Reviewer) are incredibly easy to do; if you've been on this site for a month, you could earn them. I would add more badges that provide goals for people have been on WtW a long time, too. I feel like the badge system loses importance because it's so easy to do.
The prompt system is another thing I'd like to see changed. I think that prompts should stay around longer, and there should be an easier way to view old prompts.
The reviewing questions are another thing. There should be more constructive questions, especially on "Free Writing" pieces. Right now, the questions for a default review are, in my opinion, unhelpful. Constructive criticism makes for the best review, and the questions on the reviews don't offer a place to give that. I would recommend adding a, "What could the writer do better" question, so that there's an easier way.
Are there any changes you would make to the site? See above. I also think that the competitions should be arranged slightly differently. Most of the time, winners/second placers are pieces from blank profiles that only have one piece of published work under them, and no other activity. I feel like these people aren't the main targeted audience for the competitions---the competitions are for the community, and it should be the community that places in them.
What types of prompts or competitions would you like to see more of? More fiction, poetry, and reviewing, and less personal narrative/political stuff. I don't know if I'm the only one that noticed, but we have a lot of personal narrative-y, making change-y competitions. I would be more interested in flash fiction contests, novel contests, and specific poetry contests.
How could we encourage more peer reviewing? What would make you write peer reviews more often? Get rid of the Master Reviewer badge. Instead of encouraging people to write in-depth reviews, it's making most reviews shallow, with no real consideration for the work. Lots of people only want the badge. I would eliminate the badge and just trust that writers are going to want to give feedback to others.
Offering prizes for in-depth reviews is a good way to go. Maybe we could have review competitions---sort of like writing competitions, only it's for who can give the best review.