Weird you got sleet in Feb 11, 2010. I don't remember any sleet with that one. Seemed like a straight cold powder bomb, but maybe I'm not remembering right. Maybe there was a lull with sleet in the middle.
I think recency bias is part of the issue. I don't remember sleet in any of the 2009-2010 storms, and not in the 2016 storm either. I got sleet in 2003, but it was at the end and I was in College Park, which got less (and always seems to) than the surrounding area anyway.
You also tend to remember the great part of the storms and the end result more than anything that happened during it, though when you are getting sleeted on, it is agonizing waiting for the changeover. It was torture waiting for the changeover in January 2011, and then it dumped like 8 inches in three hours.