Let me add some negative aspects. Not trying to scare you off, but LEOs will know what I'm talking about here.
Get used to working nights, weekends, and holidays. Typically rookies do not get the day shift.
Get used to having to fight hard to stay in shape. There is a reason a lot of cops get fat. Hours and hours and hours of sitting in a police cruiser, followed by moments of pure oh-crap-fear-based adrenalin. You eat crap from drive through windows at fast-food joints because you never know when you'll have to toss your meal out the window and respond code.
Your outlook on life will change. You spend most of your life around basically decent people, with a few flaming a-holes. Get ready for turnabout. Most of the people you'll have to deal with hate your guts, hate each other's guts, and not one of them will ever tell the truth about anything, ever. You may become convinced that 90% of all people are scum - because those are the people you'll be dealing with mostly.
Your sense of humor will change and none of your current friends will get the jokes you think are funny. Only your oldest and best friends will remain on good terms with you. The casual friends will slowly become offended and drift away. They'll find your humor 'not funny' or even 'sick'.
Your new friends will be EMT's, doctors and nurses at ER's, and sometimes firefighters. Those are the people you see on a daily basis.
A lot of cops are of a certain type. Classic Type A, which can mean adrenalin junkies, sexist, and full-on macho d00ds. Not all, but lots.
Hope you don't mind spending your off hours sitting in court waiting to testify against someone you arrested months ago and can barely remember. You'll get paid for your time, but you have to do, and it will be during the day - the middle of your night. And you'll enjoy being torn a new one by the defense attorney. You'll learn to speak legalese. And cop jargon, which is incomprehensible to non-cops, except for inveterate three-toothed watchers of cop reality shows, who will enjoy displaying their prowess on you.
You'll never look at a kitchen again without thinking about how many knives are in it and how many of them can kill you.
You keep your house clean and imagine most other people do too. That's over. There are some smells you will never quite get out of your nostrils, like what a diaper smells like after a kid has been wearing it for three days.
You will be spit on, barfed on, and you'll be jabbed by sharp things arrestees keep in their pockets. Dopers hide baggies in the back seat of your cruiser, drunks pee and even poop in the back too. You'll occasionally pull the back seat of your cruiser at the end of your shift and find a loaded handgun, which you missed on pat-down and wasn't used to kill you - this time.
You'll be injured on a regular basis, and you'll learn to actually not mind a new set of stitches, as long as you don't have to pay for new uniform items out of your own pocket.
You will see the same idiots over and over again, since about half of your time will be spent dealing with domestics. Wife gets beat, hubby gets arrested, and she bails him out while you're still doing the paperwork - and the same woman who was screaming for you to arrest that a-hole is now calling you every name in the book as she springs her butthead hubby so he can beat her some more next week.
You will spend time talking to children who have been molested by their parents and close relatives. In fact, you'll begin to think that every daddy diddles his daughters.
I could go on. Not sure I should.
It takes a special type to be a cop. At one time, that was what I wanted to be. The badge, the gun, the authority. Later, I wanted something more substantial - the chance to do good, help my community, give back.
However, it is an isolated life. Not unhappy, but you have to learn to be happy by yourself and without the approval of your (previous) friends and sometimes family (unless you're from a cop family). You work hard, alternate between extreme boredom and crap-your-pants fear, and slowly get fat. Some of your coworkers are goons, others are great. All of you will burn out early, get hurt like a pro athlete until you can't run so good anymore and maybe not walk so good either, and probably retire on a disability pension. Some few end up alcoholics, fewer end up eating their guns.
They're heroes for doing what they do, and they have my respect. I had to walk away from it, but there are people who can do it for a lifetime. If you can, I wish you the best and you have my honest respect for it.