From a practical point of view:
- reliable
- simple (my wife wants revolvers for HD. So do I.)
- as a reloader, they are VERY versatile and forgiving
- handle more ammo in one platform like 38 special in a 357, etc.
- can be single action as well as double action in a DA
- spent brass stays where I want it, not all over creation at ground level
- no magazine springs to worry about
- No semiautos in 44 special
- black powder cartridges in a good single action are just so cool
- helps me conserve ammo and appreciate each shot
- you get the idea
Esthetics:
- I just plain like the looks and feel
- They remind me of my first guns: a pair of Roy Rogers cap pistols for my fifth Christmas
- They fit my philosophy of valuing the old but effective, along with a 60 year old Gillette safety razor, bolt action rifles and SxS shotguns, manual typewriters for drafts, hand tools for wood working and carving, cards, board games and jigsaw puzzles for entertainment, and so many other things. This whole electricity thing is just a passing fad.
I use and enjoy semis. My wife's target shooting (except for SD practice) is with semis in 22 and 9mm and she is good. But NOTHING beats a good revolver.
If I missed anything, see Olddog's post above.
Jeff