I like novelizations of games' universes. It expands upon characters and the setting in a way few games can get into the necessary depth. Gaming literature is rather fun to me--it's usually violent and rather simplistic in nature, like the games themselves. Sure, there might be interesting character developments, or unique situations, but the core still remains: usually killing the bad dudes.
Quite frankly, gaming literature is the reason why I started to love reading, and enjoy reading. And, boy, have I read plenty.
Multiple Warhammer 40k Omnibuses, Starcraft: Dark Templar Trilogy, Liberty's Crusade (Now I want to read this one again), and Shadow of the Xel'naga, some Warcraft lore titles, Star Wars: Republic Commando and a few expanded Universe, all the Halo novelizations up to Cole Protocol, and probably more that I cannot think of right now.