I bought it for two real reasons. One as a cheap alternative to the expensive PS2 and way over priced Game Cube ports of the same games. Two, the Sega exclusives as I love Sega, minus that stupid cartoony skate boarding game, but yes Panzer Dragoon Orta is on my to get list.
I have only had the system for barely 2 weeks and am already up to 36 games and counting. I am surprised how cheap they are, I saw Taito Legends for PS2 at a game store, $25 bucks, I picked up the same game on Xbox at the same store, $6. That right there is number one reason I wanted me an Xbox.
I am kind of weird in my gaming style though. I like Nintendo, sort of, and I really love Sega, but I hate cartoony and cutesy games for the most part and am not that into quirky stuff. I despise Animal Crossing, Pikmin, Pokemon and hate all things that are made out of yarn or look like water color graphics.
As for exclusives, I am looking mainly at Mech games, sci-fi games, a few shooters, and the 1st party stuff. For multiplats I will always pick whichever version I come across that is the cheapest, regardless of content or quality, I just want the core game I don't care about online (those are all offline now anyways) and I am not into rhythm games or sports or racing games that much. Except I like some arcade racing games I am familiar with the ones to get.
Thanks for the discussions I am trying to get all this sorted out. Please don't be taken back by my bluntness I am not that tactful.