Cup and cone here. I can service them with the cone wrenches I already have and the Park bike grease I also have.
I like the simplicity and ease of replacement. If you like cartridge, then by all means, use what you like! I can't justify the expense for GOOD cartridge bearing hubs, but good cup and cone hubs (shimano) work very well. Just re-pack and properly adjust when new, and your set for years of use.