lachemo, to answer your question, I like both the Playstation 3 and XBOX 360 for many different reasons.
I love that the PS3 has Blu-Ray capabilities, and their exclusive games are amongst my favorites of all time. God of War 1, 2, and 3 plus Uncharted: Drake's Fortune and Among Thieves are my five fav games of all time. This is of course, my opinion, but I love all of those games. With God of War, the story, art, gameplay value, and in some aspects it could be considered an RPG game. With Uncharted I love the story, how its a little puzzle solving, climbing, cut-screne, and most importanly shoot em up, all put into one.
With the XBOX 360, I like it because many of my friends have it, and if I ever take it to their houses, we can system link or play online and play co-op in many different games. I use it as my second CD player, as some of my music is put on it. My most important music really. My favorite games for the system are: Gears of War 1 and 2, Left 4 Dead 1 and 2, Saints Row 2, and Call of Duty: Modern Warfare 2. I love the exclusives for this system as well. Gears Of War and Left 4 Dead are amongst my fav games of all time.
When it comes to games being released for both systems, I check with friends first to see what system they are getting it on, so I can make a choice if I want to face them or be on their team on the same console or just do my own thing on a different system. It usually comes down to playing with or against my friends, but since many of my friends have XBOX 360 and I don't have live, for many of my games now, I'm just gonna go with the PS3.
I'm just thankful I have both a PS3 and XBOX 360, so I can buy the exclusives for both systems, and have the annoying choice of what system to get the game for if it is a multi-console game.
Sorry for the long reply, I have turned into a hardcore gamer, and I can type or talk for hours about the subject.