I do only because I don't really enjoy watching TV. However I've been trying to cut back on my computer time and put it into other productive means like my social life. Can't sit on a computer all day and get what you need for social interaction, no matter if you have 10 chats going
apart from sleeping eating and travelling, I'm on a computer all the time, so I guess that is too much but hey I love it and I work with computers so I can't escape them during the day, at night I can go home and play games and sit on Msn.
I only spend a whole great deal of time in the computer when I get to test a PC gaming software and my part-time job quite unique, that is testing them and checking for bugs and issues, my eyeballs literally drop off my eyes after 6 - 8 hours straight. But I can still say it is just enough time spent on the computer since it is productive anyways and not a waste of time.