disc brakes

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They add more weight. At the professional cyclocross level, for that reason, you see a lot of riders reticent to use disk brakes. There is also the risk of injuries, as disks can cut someone easily in a crash (which is why many pro road racers don't want them). If you do not intend to race, I would say than it depends on where you ride. The one occasion I wished I had hydraulic disk brakes was on a 4 mile twisty descent on gravel, with grades over -5% -- I was on my cross bike with cantilever brakes. I would feel the same on a wet descent on my road bike, but I am rarely in that spot (long, twisty, descent on wet roads). My next road bike would have hydraulic brakes (not disk). And I wish there were hydraulic canti brakes... Don't know about maintenance of disk brakes.

Note -- How much weight do the add? From VeloNews: "Discs will add somewhere between 250 and 750 grams, depending on the component choices made."