Texas Hold-em is a genius game. In fact, I may even like it better than any videogame. Though I am a cheapskate and my friends and I play with 5,10, and 25 cent chips so we can go for a few hours and usually no one wins or loses more than $5.
I also know a really intense variation of hold-em which I've always known as Omaha. It's similar to texas hold-em, except everyone has 4 cards, but you can only play with 2 of the 4 you have. And also you can play for highest hand, AND lowest hand (lowest being 5 cards, all 8 or under, and no doubles). If there is a low hand and someone wins for that, and the high hand they just split the pot, but that rarely happens anyway. It's a lot more intense than hold-em because it's so easy to almost have a great hand, and there's more possibilities of danger from other players.