I prefer the middle of the road ...a lens set to "Wide" t begins distort strait lines and can exaggerate parallax
A lens set to tele or slightly zoomed from what is considered Normal begins to compress the image .....making things further away in the back ground seem closer to an object in the fore ground than it actually is
what focal length is "normal" .... that depends on the format ( no I'm not referring to file type)
In the old days "format" referred to the size of the negative
a "normal" lens ...one that gives similar perspective as your eye (I'm not talking of field of view here) for a 35mm format camera it right around is 50mm
My medium format Hasselblad had a format or negative size of 2 1/4" x2 1/4" and it's "normal" lens was an 80mm
how are these numbers arrived @ that would take way more explanation than I planned on doing here .......basically it has to do with optics and whats known as the image circle
So to determine whats "normal" for a digital camera really depends on the size of its Image chip ...and that varies widely from camera to camera ....so there is not really a hard and fast answer to that question as there once was with film cameras
For my G9 I find , its in the middle of its zoom range
Hasselbald has/had a 2 1/4 (film) camera known as the SWc (Super Wide Camera) it has a Ziess lens that takes distortion -less pics at a normal perspective but has the same field of view as human eyes just under 180...... bonus is that it also "Sees just under 180 vertically too !....its the only camera in the world that can take a high res. wide angle distortion-less photo ..... in one shot.......... think about it ......thats a completely distortion less 360 pano in 4 shots !
if you scanned them into digital ....you could make perfect panos with any basic photo editor