If you are still in doubt, don't worry: once you start, you won't be able to stop. But I will tell you about this unique experience to awaken your thirst for good roguelikes.
The Binding of Isaac features a little boy who travels through floors, killing monsters and bosses with very creative designs with his tears (or other... stuff). When you think you've completed the game, destroying the final enemy, congratulations! The tutorial is done and you need to go deeper. There is a reason players spend thousands of hours there, trust me.
The best part of all this, the reason for the crazy in-game time, is the many items you find and how different they make each run. And if you get lonely traversing the basements, invite some friends – I'm sure at least a couple of them have the game.
