PPB, most of the above are not exclusive to autumn!
As for the rest, fuck me, you're miserable buggers. I love a good firework display & fireworks generally. I'm not a fan of halloween so much, and definitely not a fan of it being stretched out for weeks. However there's something in every season I love, for example autumn also usually involves harvesting stuff I've grown. On the leaves issue, this year I'm making leave mold, an excellent mulch for the garden.
Fresh, crisp mornings, getting your cool jackets out the wardrobe, autumn is great, as is every other season. Sure, they all have things that aren't ideal, but jeez!