One of the reasons why I prefer D size flashlights for "general purpose" use is that they're larger/bulkier than smaller AA/CR123 size flashlights, which makes them harder to misplace (our family has lost countless AA & smaller size flashlights). I have a handful of AA flashlights for general use that requires something smaller and/or lighter. I actually really like 2D size Maglights for working on cars & general purpose work - inexpensive, tough and hard to misplace. I have a AA Mini-Mag that I keep in the tool chest when I need something for smaller/tight spaces. I have a 4D Maglight that was given to me as a kid in Boy Scouts that I'm prob going to sell because its simply too big to be practical for anything other than being used as a club.
Even though there's definitely better lights out there than a Maglight, I like them, they're inexpensive & durable and they work for what I want them for. The plan is to have a 2D Maglite & AA Mini-Mag in every car/truck, & a AA Mini-Mag in every motorcycle seat pack. Also, a reasonable amount of spare batteries will be stored in extra-small Pelican cases in each vehicle (these extra small Pelican cases are very popular for portable, secure battery storage).
I usually EDC a Surefire 6P with a Malkoff lamp, which is my primary CR123 light. Until they become as popular/common as AA & AAA, I'll keep them for special/tactical use (weapon mounted lights, tactical lights, etc). Even though AA doesn't preform as good as CR123, its a better SHTF/common usage battery because of its commonality & cost.