First you have to make a decision on how much money you are willing to spend. Be practical. If youre just looking to play video games and nothing more, a PC platform can be quite expensive when compared to a console video game system. But if you or your family already has a computer, many of the popular games available for console systems are available for the PC. After all video games are designed and tested on a PC (as well as being tested on the console itself).
With prices under $200, game consoles such as Microsofts Xbox, Sonys Playstation 2, and Nintendos Game Cube offer a wide variety of games with only a no need of any technical knowledge in order to play a game. PCs, on the other hand, offer much more than just a video game platform, all of which are well know and documented, better left to other websites and articles!
Video game consoles also, unfortunately have a much more limited life than PCs do, Microsofts Xbox is the most technologically advanced video game system on the market today, but rest assured the next generation game console is already in the works. Along with Sony & Nintendos next generation, game systems will continue the cycle of replacing their predecessors every few years. PCs offer the unique ability to upgrade hardware, with some technical experience required, but without having to replace the entire computer. Either by adding memory, storage space, graphics cards, or even a new motherboard, you can extend the life of your PC without spending the high prices of a completely new computer.
Also, it still remains to be seen if Microsoft and Nintendo will follow Sonys lead with the PS2 and allow games from the previous generation system to be played on their respective next generation consoles. With PCs, if a game works on your current system it will work on any future computer you may purchase.