In reply to raussmf:
Comfort, weight, chaffing.
I have a few pairs of cheap (£7) decathlon running shorts, which would great except if running more than a few miles, they tend to chafe. A short compression short underneath eliminates that, but this can be too warm and uncomfortable in the summer.
My preference these days are some Patagonia running shorts (Strider Pro 5”), which a really nice but we’re very expensive, some innov8 ones which were quite expensive, but not too bad in a sale and some Montane ones which are also quite expensive.
Its a part of my body that I am keen to look after.