Fanboys(or FanGIRLS) exist for a few reasons. One is we don't have a large budget and thus, must choswe one console, which we love. Anothger is from childhood. I loved Nintendo and Sega back in the day. This is why I am a Nintendo fan(would be a Sega fan if they still existed). Another is becuase of what games we like more. A lot of Nintendo fans are Nintendo fans becuase of the in house Nintendo games.