I have had a XBOX for about 9/8 years now and it is wonderful in not breaking down and has had no problems. About 3.5 years ago I got a Wii, and although I do like it better for some games, such as Wii Sports Resort, I never found any really good games for it. I played CoD4 on it for quite a while and had no problems. However, when I got PS3 2 years ago, I realized just how bad the Wii's graphics were. Although the Ps3 has more problems than my past two systems combined, including annoying crashes and internet issues, my friends with 360 have had many more problems, as about 6 friends of mine have had to had their XBOX 360 taken in.
Overall, I'd say that the original XBOX was the best system, however PS3 has allowed me to connect with my friends and was very good value for getting free internet and a blu-ray player. It also has Uncharted to call its own that could put up a fight with Halo. Also, with Journey and Flower among other minis, I think that PS3 trumps the XBOX 360 and the Wii.