I think ToME is my most played game of all time. It's an excellent roguelike with a huge variety of character options. The game is certainly overlong, and random spikes of difficulty can be frustrating, though both issues are mitigated by the default mode allowing for multiple lives. I don't play it much these days since it can really chew through time, but I'm sure I'll be back when the upcoming DLC finally releases. Well, if it does.