I think I am most attracted to games these days with staff that have and implement good boundaries as far as community behavior expectations, are not intimidated to remove problem players regardless of talent, or to say no to things that create theme drift away from what they the staff feel most energized and creative running/providing for. Including when people decide to close/wrap a game.
With that foundation I as a player feel more comfortable taking risks and exploring the theme/play available, rather than just keeping my head down.
I like to see experiments. I'm rarely disappointed even if they close because an energized and happy staff makes things enjoyable for me, usually, if that energy is a good fit.
I like all kinds of genres and I often enjoy games based on things I am meh about the original content (love battlestar games, but I am ugh about the "new" tv show for whatever reason, same thing with Buffy, those games were super fun but I actively loathe the TV show!). I find gamerunner enthusiasm to be by far the biggest predictor of my own happiness as a player on a game.
So I am totally in the camp of build what YOU are most excited for, not what you think will fill a "need" but you're not totally into it.