OT fashion question for 30-somethings: skirt length?

So I’m sewing my first skirt, a simple A-line in black corduroy. I thought I’d hem it to hit right at the top of the knee, so that I could wear it with my new boots and still have a little bit of my tights showing. When I tried the skirt (still a WIP) on for my husband, he was surprised at the length. I ordinarily wear long slim skirts, so it’s definitely different for me. But he acted like he thought it wasn’t something a thirtysomething professional with kids would wear (he asked: where will you wear this? and I had been thinking work!).

It made me wonder: am I attracted to a style that’s too young for me? What hem-length do the rest of you 30somethings prefer?