This game is superb, I'm still coming back to it.
This is a close as you can get to commanding your own star-ship. I have gone through phases of playing FTL heavily and then leaving it for a time only to become obsessed again without realizing it's even happening. The fact that it's one of the first big Kickstarter success stories adds some charm too I feel.
If you are reading this you should go grab the demo off Steam right now and give it a whirl, that soundtrack!!!!!
I know Roguelikes are a genre all of there own, I don't really know too much about that but I know this is apparently a good example of the genre and I can't say enough good things about it.
YOU ARE DESTINED TO FAIL! But you'll jump straight back in ready to try again.
GOOD LUCK, CAP'N.