I had a cat growing up and now want to get one again. Should I have it fixed? What are the pros/cons of having it fixed. And Not?

If you get a female, you'll know the benefits of getting it fixed the first time it goes into heat. The creature will writhe and howl in total horniness through the night. There will be precious little sleep. Even if it is less loud about it, going into heat will come more often until it gets what it wants and you have kittens to deal with. If it doesn't then it may start spraying around the house. Yes, females do that too.
If male, then the spraying behavior is much more likely. It will probably beg you to be let out. It will make its contribution to the pet overpopulation problem, either making more strays or leaving someone else with kittens to deal with.

The cat will only miss the heat cycle (you sure won't) and raisding kittens, but they don't really know they are missing anything. They mostly live in the moment, so as long as food, life and company is good, they are happy.

Cats tend to be much more relaxed and domesticated once they have been fixed, and you don't have to worry about kittens or territory marking.

Cat overpopulation is a huge problem. If more people took the time and effort to have their pet spayed/neutered, loving homes for those that remain might be found. Ask any humane society what the kill rate is for the local pound. They always have too many unwanted pets.

yes get it fixed, it will be better for you and the cat, less problems to deal with in the long term.

Yes, get your cat neutered or spayed. Male cats will 'spray' if they're not neutered and the female, as someone else mentioned, will roll around and meow. Both are annoying.

cat that are fixed tend to get fat and have more health issues, cats that are not fixed seam to wander off when they escape come back pregnant or never come back.Go to a animal shelter and have a older cat pick you and enjoy the time they have left,A cat can live twenty years or more.vet bills can bankrupt you so invest in a insurance that your vet and animal hospital will except .a broken leg can cost up to 5000 dollars

What do you mean by 'fixed'? Do you intend to get one that has some physical problem?

sure, and get yourself fixed too. (you'll love it)