I also miss replayability in most new games. Older games are generally more fast-paced and keep your mind focused on the gameplay, allowing for what could be endless play (well, with some healthy time inbetween haha). JJ2 has this aspect, and includes online play and customization. IT'S AN ENDLESS GAME. lol

Other than that, I'm currently replaying some DOS games like the old Duke Nukem sidescroller. And got a crush with Danmaku shooters and Minecraft.