Personally, I think V-brakes require more maintenance.
1. Eventually your rim will wear out.
2. Before it wears out, it makes a horrible noise grinding on the rim when the rim or pads get dirty or muddy, which is pretty much all the time.
3. You need to clean out the pads when they get imbedded with grit. PITA
Disc brakes? Well, so far, I've just hosed them off.