I perhaps should have pre-fixed by comments with "when going for a local bimble" or some such thing.
If going over water for any length of time then additional equipment needs thought about, same as if going over mountainous / remote terrain in winter. Do I think about the risks for the flight I'm about to do - yes.
But a full Nomex suit for a local bimble (or a cross country flight over lower lying land) in a typical light aircraft seems overkill to me, which was my point (I think I agree with you A&C)
Shorts - I've flown in. Flip flops I've not (would effect my rudder peddle control). Hawaiian shirt I haven't - although that's mainly because my other half thought mine was so bad she threw it out...