This question should never be asked to a flashaholic as they never ONLY have one torch.
It's like asking a peanut-aholic which peanut he would choose if he could only have one and would it be salted or dry-roasted ... It just cannot happen.
Ask a jelly-baby-aholic which one he would choose ... It's an impossible choice and could never happen.
Could you open a huge box of gorgeous Belgian or Swiss chocolates and only choose one ? ... NO of course not !
I never go anywhere with only one torch ... Each of my sets of keys has an ITP A3 attatched ... I have an ITP A2 in my inside jacket pocket ... These are with me all the time except in bed , but I have an ITP A2 , ITP A1 , Solarforce L2 and a Solarforce Skyline 1 by the bed ... In the Lounge I have a Solarforce L2 & a Solarforce L2i and in the kitchen a Maglite 2C with a Fusion Showerhead fitted plus a Maglite LED ... In the study , I have 15 assorted torches and in the car there are two plus spare Lithium batteries.
There are other torches dotted about in the house and my Wife has a couple in handbags plus on her keyrings.
Only one flashlight ...
IT CAN NEVER HAPPEN !