The positives I see are that I could hatch my own eggs if/when I needed to, and I also just really like listening to roosters.
I also like hearing my boys crow.
It's good that you are really thinking about why you want a rooster. Too many people go into it impulsively and with no realistic idea of what they could be getting into.
Do you think that you're capable of dealing decisively with a problem bird if you get one? Cockerels are a major gamble as to how they turn out and while some breeds have reputations for one behavior or another, the individual birds' temperaments vary wildly.
If you're wanting to breed your own birds, you'll need to consider what qualities you want to take forward in your flock -- production characteristics, temperament, coloration, hardiness, etc.
The usual recommendation is 1 male for every 10 females -- which isn't a guarantee that there won't be over-mating issues (I'm at 1-10 with mine and have 3 barebacked hens, one significantly so). If you decide to get a male one option would be to order more straight-run chicks than you want to keep, choose the best male and the best females and sell or eat the rest.
Or buy sexed males and females, against getting extras and picking the best to keep.
Or, as another alternative, get some more girls and keep your eye out for a mature male who has to be rehomed but is just such a good boy that the owner can't bear to eat him.
@Mrs. K has good advice in re: finding a good rooster.