Luned: $19.95 a month for World of Warcraft wasn't in my budget for a long time... and I still can't see it.
Neverwinter Nights 1, buy the box, get the toolbox to make your own worlds and play on other people's? That was way more affordable. Several years later, and I still hang out with my friends that way. I'm more of an RPG'er (I started out in pen-and-paper gaming) than an action "press-these-seven-buttons-with-millisecond-timing" junkie anyway, so NWN suits me. :)
Guitar Hero is a ton of fun. :P
Hahaha, just kidding, it's all about Rockband.
I don't support Guitar Hero World Tour, because they put their advertising dollars towards Kobe Bryant, and Kobe Bryant is against teenage girls, and I am totally for teenage girls.