For WRPGs, I really liked Mass Effect. It had a good story, the combat didn't get dull, and I got to have a spaceship. Fallout 3, because of the locations and the general premise of the game: but most of all for the Tranquility Lane part. The Witcher was another great game, but flawed. Because you can defeat giant monsters, but can't jump over a hedge keeps you on a narrow path; but being kept on that path enables some great storytelling, if a little cheesy and crass at times. Ultima Underworld 2, because at the time it was truly amazing, with eight wildly different worlds, all from an FPS viewpoint.
I'm less of a fan of JRPGs, but I really liked Shadow Hearts 2. I liked the combat ring system, and the story was interesting and fun. Final Fantasy X was the first JRPG that I played, and I enjoyed it immensely, I liked the linearity of it, strangely enough; the sense of being on a journey. I still play JRPGs occasionally; for me, they're the gaming equivalent of meditation: you just relax, perform a repetitive series of actions and watch the story unfold. And, as I discovered when I needed to reach a save point before I went to work, I can play Lost Odyssey with my feet while I'm eating dinner.