Yahoo Mail beta...actually pretty good!

If I were to rank em, I'd say Yahoo is at the top in terms of simplicity and quickness, and the location of the "delete" button; Gmail gets props for a wide range of customization and the fact that everything is synced with my Android; Hotmail is my least favorite, in no small part because it uses small buttons, but also because it only works well if you're using it with Internet Explorer.

But I will still use Gmail as my primary, because it's just so flexible and my synced contacts for Android makes life so much easier.  Still, Yahoo deserves huge props.