I've never had a bike with disc brakes and am generally content with rim brakes. I also ride for fun, not commuting. What is the terrain like where you ride? If I rode more often in areas with long downhills I would look into disc brakes.

I generally don't have problems with maintenance or wear with rim brakes. Lately I have had issues with mystery noise and vibrations with the front wheel which may be brake related, but I think tire width is also a factor.