Really you have no idea? Pads and phones are used mainly by casual players with somewhat unpredictable way how games will succeed. Mostly it's a viral thing on some social media that makes it possible. Roguelikes are not that good if you want to make money, but it may work.
For traditional roguelikes the platform is PC.
I have an idea, but some data to support it is not that bad, and the poll is quite effortless anyway for both sides (poll-er and poll-ees). I'm not really doing a ... market research: I just want to know, if by any chance I ever manage to release anything into the wild, how should I balance "Multiplatform programming effort" <----> "Userbase size". Mind you, not for money and such (money is on pads/mobiles for indie devs, whether we like it or not), more like for *exposure* : "here, I made this cool thing, wanna try it?"
It's good to identify cases such as AgingMinotaur, who said:
Anything that piques my interest and runs on Linux or in a browser, I can try out in a few minutes. I have to be really intrigued to go through the hassle of trying out Windows-only applications, though.
And since anything roguelikey would enjoy some level of testing here more than other places, it's a good idea to know what platform do the forumites prefer to be continuously killed on