As noted, if you have a rooster, you will have fertilized eggs, But that does not change the quality of the eggs in any way.
It also gives you the option of hatching chicks if a hen goes broody. And hatching peeps under a broody hen is soooo cool.
The main question is do you want a rooster?
Will he help protect the flock? Sure.
Do your birds free range? If so, having a rooster is a little bit of insurance. But no guarantee against predation.
Are they fun to have around? Sure, as long as you make him behave.
If I could have a rooster I would. But our ordinance does not allow it. But if I could I would.