I really like reading his writeups on roguelike developments. I also play Cogmind and it's been a timesink too. With each major update, he also introduces a "mod" option that lets you play the game in different ways and that refreshes the game so well.
For example, Cogmind is a game in which you blow up other robots and take their parts in as yours. Each time you would go up a level, you would be able to put points into different categories that let you accomodate more parts, etc. One time however, the game added a different way of playing that lets you "buy" upgrades as you level up (level up as in going up a level). That made the game quite different and I had fun playing it all over again.
For example, Cogmind is a game in which you blow up other robots and take their parts in as yours. Each time you would go up a level, you would be able to put points into different categories that let you accomodate more parts, etc. One time however, the game added a different way of playing that lets you "buy" upgrades as you level up (level up as in going up a level). That made the game quite different and I had fun playing it all over again.