1. Quality = Has to work all the time , every time .
2. Price = If you cant afford it ?
3. Modes = High Med Low ( Moon ) , discard or hide the flashy modes
4. Efficiency = Is it efficient with your battery of choice ?
5. I want AA = New technology , more development has resulted in much better AA lights
ATM my fav EDC is the C15A , this little light has become my flashlight of choice , I used to Love the L2's , but better made AA lights are making them a 2nd or 3rd choice .
Its getting to the point Im considering a " garage sale " for most of my single 18650 flashlights , I hardly use them anymore .
A few more years , a few LED updates , new tech , and the single 18650 might become redundant ( replaced by single and double AA lights )
I know , the single 18650 will offer more power , more throw , etc , but will it fit in your trouser pocket , will it be there when you need it ?
This is where single AA or AAA rule the roost , easy to EDC .
I have a small AAA on my keychain , and when I go out for a walk in the evening , the easy to pocket C15A goes with me .
( Parasitic drain has not been a issue with the C15A , it seems to go into hibernation mode and draws very little current )