Ill chip in here with my tuppence.

I currently only own three sporran’s which manage to do me fine. One SWK nylon cargo sporran, one black leather "day" sporran and one black rabbit dress sporran with silver coloured cantle (got it from eBay so it’s not fantastic but it looks ok!).
The SWK is my go to sporran the one I wear 95% of the time, I’m out and about in a kilt.
The leather one I feel is a bit more formal and while I could (should) wear it more I tend to keep it for when I’m going out and I’m wearing a shirt, Not necessarily formal just an open necked shirt or shirt and tie.
Any time when I’m wearing a jacket I find myself dusting off the Rabbit sporran as I find it to look smarter even though it can’t hold much.

I would love a big horse hair sporran which I could wear for any situation as long as it would actually hold things there’s no point in having one if it only has a little pouch in it, and possibly a Thorrofin also.