Not Practical For Me (or Logical)If I've got a massive amount of wash to do, I'll separate out the linens and let them have their own load. Otherwise, I don't bother. Aside from the whole not-wanting-to spend-energy-sorting thing, I've got some reasons to not sort.
For one, I'm doing wash for one. I can see sorting (sort of) if I was dealing with a family's worth of laundry. But I've got nobody to please but me with the results of my washing.
The other big reason is that I live with two housemates. The more loads I do here, the more likely I am to hear "Plaid are you done with the washer/dryer yet? I need it."
And anyway, it really doesn't matter. If I use cold water and a reasonable setting on the dryer, everything gets clean without me sorting.