What are you people doing to your edges that your blades need to be sharppend that much? Or maybe mine are no longer as sharp as I think, but they seem to cut well on everything I aim them at.
In my house we generally cook dinner 6 nights a week, and there's a lot of vegetable chopping and prep work for many of those dinners. I probably *should* be sharpening every 3 months, but I get lazy and it's usually every 6 months or so.