I too am in agreement with both of you. This is the very reason I liked using the P3 in 18650 mode. The rest of my hand had something to hold onto, and my thumb could naturally fall on the fire button. In 18490 or 18350 modes, I fired it with my index finger.
This is one area the SXmini excels - the fire button is curved from the face to the top and can fire in any position. Likewise, the Reo
mods that have the fire button on top are much more comfortable to hold.
I haven't held a Radius yet, but have given though to how I would fire it, since it's so short, and figure I'll use my index finger most of the time.
Nope, definitely not just you.