Don't have a problem with flip flops, but points 2 and 3 really irritate me.
You will generally find the only men (and I use the word men in the very loosest of terms) tend to be pasty, skinny, weedy, concave chested chavs.
Quite why these little turds feel the need to whip off their Donnay T-Shirt at the first sign of some good weather is one of life's great unanswered questions.
As for 3/4 length trousers - any man over the age of 18 who wears these looks like an absolute prat.