I liked seeing my spam folder so that I could check it for missing emails erroneously routed there. I also loathe that "Priority" is the default Inbox filter and cannot be changed (that I can find). It took me quite some time to even realize this was preventing me from seeing emails I knew I had. Honestly, "All" should be the default, or there should be some way to change behavior rather than having to click "All" EVERY SINGLE TIME I open my email.