Too many lumens.  I often need just enough light to reach into shadows at night without ruining my natural night vision.  When I need a lot of light to make coyotes uncomfortable it's nice to have that option, but more often I need way less. 
Flashlight manufacturers should pay more attention to the low end imo.  Foursevens has a Moonlight mode and Thrunite has a Firefly mode, but most flashlights don't go anywhere near low enough.  YMMV