I used to like PC adventure games like all the different 'quest' games by SIERRA, but with the increases in technology and all the changing formats, I don't like what Sierra turned into. I was also into older Advanced Dungeons & Dragons games (not Baldur's Gate, but the OLD games, like Champions of Krynn, Death Knights of Krynn, Curse of the Azure Bonds, etc.), most of today's games won't run on any computer as Jeff says, unless your system has the EXACT prerequisites for the game, which pisses me off. Also, I can't really play older games, because my new computer is too fast for them (Yet, with all the advancements Microsoft STILL cannot create a decent Windows operating system that doesn't crash every 5-10 minutes?) I mostly stick to emulators and roms, because they're free, and they actually work on my computer. Now I can play all the old console games I used to have that can't be found anymore.
Other than that, I primarily stick to console, and that means Playstation 2. When I have time to play, I'll blast through any Final Fantasy or Squaresoft game that's available.