Don't even bother try to convince me to go Xbox, I did my homework and in the grand scheme of things depending on what you want and what I want, PS2 is my choice. But I am bored and have time to kill so I will list out how I came to this decision.
First I have a kick a$$ PC and I am a PC tech so building, changing, fixing, etc. costs me nothing more than parts. So why not stick to PC you ask? Well let me tell you; first to keep up with the demands of games you have to upgrade your video card and ram about every two years with many of the games (NOT ALL). Second the cost of a good video card can cost you anywhere from $150 to $300 and up, and ram is not that bad but like I said the video card is a huge cost. So about every two years you are doing that, now add the cost of the games (assuming you are paying for them). See the dollar signs come and go from your wallet yet?
Now take counsels, regardless of which one you get you buy it, the secondary controller, max out the memory, and any additions you like to buy and that is it. You are all set for the next 4 to 5 years unless it breaks, and since they are so affordable you might as well just buy a new one. Also if you want to buy some additional things that is trivial for it is not mandatory to do so.
Now comes the question which one, well if you ask people chances are you will get more opinions than facts. Perfect example that I see and hear a lot, "PS2 sucks get a XBox." The fact is that is not true. If you find this website i found by doing a Google search for PS2 vs Xbox you will get a great factual break down of the differences between Xbox, PS2, and the Gamecube. I will sum it up for you: the Gamecube is great for preteens for the games made for it fits them, and some parents are concerned about such things. Now you have the PS2 and Xbox. The Xbox is basically a PC compacted into a square box with great graphics; it does NOT have the library of games like the PS2. Plus this is their first version of it and there are rumors they are going to drop the line. Not to mention PS2 not only has a great library but also is backwards comptable, and this is expected with their 2006 Fall edition the PS3.
To conclude, it really comes to what you want to get out of it. For me I just want something I can connect to my TV, drink a beer, and play. No muss no fuss. Also I want a unit that has a large selection of driving and motorcycle games; can you say PS2???