Should I get ducks?

When I consider domestic animals to add to my property... there are some I like the idea of, and some I don't. Ducks are some I don't like the idea of. But there are all sorts of people who love ducks... what am I missing? But lets also be realistic... no animal is perfect.

Why should I get ducks?
Why should I not get ducks?

Pros
Good eggs
Good meat


Cons
REALLY messy
noisy
need lots of water
need lots of water changes

I was between chickens and ducks for my homestead at one point so did a bit of research but haven't had the pleasure of hands-on duck wrangling.

Pros

Eggs (Great for baking)

Meat

Pest Control (Especially slugs)

Manure

Cons

Manure handling and smell management

Water requirements (Especially in freezing climates)

Mud management

All of the above . . . plus duck herding is easy if you have along pole with a flag of some kind at the end -  just as they do in Bali and probably the rest of Indonesia.   NB Khaki Campbells are reputed not to fly!  That's BS they do and will if the mood takes 'em.
If you decide to breed and hatch the eggs,  sexing is also easy (see my tongue in cheek?)  Just choose all the cute ones - they are bound to be male.   Speaking from experience here.
They do enjoy a splash about - no need for a pond, just a  wide-ish container of water.  And be warned they are very fond of cocktail tomatoes.  Came home one day with 'pick tomatoes' at the top of the list only to find they had all vanished - then found a big patch of orange poo  outside the door where they had obviously camped earlier in the day.  
They are great characters though.   Good luck with whatever you choose.

There is a subset of Humans who are allergic to chicken eggs, but can eat duck eggs. Hubby has a small egg business, so he was happy when I got a few ducks for slug control, allowing him to sell some duck eggs.

Khaki Campbell ducks are quite high strung, and are small enough to need serious protection from aerial predators. However, they are one of the most reliable egg laying duck breeds.

We also have Muscovy which are a "South American Wood Duck" except they're closer relatives to geese than ducks. They are very sociable, but are more a source of meat than eggs as they're batch layers and go broody easily. I use their broodiness to hatch Khakis and Geese eggs, although they're not terribly happy with the experience compared to when I let them hatch Muscovy!

Khakis are also very noisy (as are the geese) whereas Muscovy are quite quiet birds.

I cooked duck eggs for my Dad for breakfast one morning and he was really really sick for two days. People here used to say that muscovy ducks were fantastic at eating flies- if you watch them, they eat several flies a minute each when they're in the mood. I had to point out though that before they had muscovy ducks they didn't have a fly problem I had thirty six muscovy ducks and fifty bantams taken by foxes in two months years ago- but I also shot three hundred dollars worth of winter fox pelts in the paddocks surrounding the homestead. Muscovy ducks are excellent mothers of whatever breed you get them to hatch out. It's worth having a couple just for that.