The greatest advantage of Wii Fit, for me, has been that it kept me going long enough to see some slight amount of progress: I now have an ab. Perhaps one day, I'll be able to pluralize that.
There are many reasons I'm not really into physical fitness programs. I don't like going to gyms. I am not a fan of instructors, choreography, or trainers. I am, I realize now, not really a planner--my style is to lay out a set of bullet-points and then casually work my way toward them.
Wii Fit is not really much of a workout. It rarely causes much cardiovascular stress, and it doesn't force you to do much of anything. But I could get up in the morning, meander through half an hour of exercise, and somehow I'd manage to do 40-50 jackknifes a day, plus motivate myself to lift some weights and occassionally even some push-ups. Again, it's not much of a workout, but it's more than I usually do. Hence the ab, of which I'm very proud, and which turns out to be powerful motivation to do more.
Of course, now the pain really starts. Because Belle has figured out that I haven't given up. And she is a planner. She makes Google calendars to track our progress. She's got three separate programs we're going to do. She's even started a blog for us, Nerds Get Fit, which is exactly what it sounds like. I haven't written there yet, but I'll cross-post this, because she says I get double the crunches if I don't.
If you don't hear from me in the near future, Internet, it is likely because I'm curled up on the Wii Fit board, cradling my sore muscles and remembering the good times we had together.