I also am a firm believer! Your brain is constantly in use compared to sitting on the couch and letting the TV turn your brain to mush. I had an elderly friend who said his computer was the salvation for his brain. He had trouble sleeping at night and instead of sitting there watching dreadful brain-numbing late night television, he would get up and go play chess on his computer.
In my PC corner for the winter, gaming, knitting and reading.