I have been driving for over 30 years and I am not what I would call a grandpa type driver. I like full throttle acceleration and routinely go 5 over and sometimes a lot more and a twisty road calls to me. BUT, what I don't do is standout. I try not to do anything that draws attention to me.
Something you were doing or the way your car or you looked drew his attention to you. My guess is maybe he was having a slow day and you not having front plates drew a little attention. A bit of tint that is beyond the legal limit which is not much will also get attention. Most states make tint something darker than 20% illegal and they can legitimately bust you.
Sounds like you are a young fellow, good for you, but also draws a little attention. Maybe something about the way you were driving also drew some attention. All the little pieces start to add up and if you get enough attention, you get pulled over at least for curiosity.
BTW, there is a US wide program right now where they are looking for no seatbelts. "Clicket or ticket". There is some complaining going on that they are getting too intrusive on this program, but that's life when the do gooders want to protect us from ourselves. Pkus most seatbelt fines are pretty good revenue for the city. However I heartly endorse seat belts, saved my life at least a couple times I think. So belts is not an issue for me, except the time my young son stood up in the front seat to look at a police car, duh, $250 fine.
Fact of life is young fellows in flashy cars are usually pulled over more often than old farts in an Oldsmobile. You will outgrow this.
The officer almost certainly had nothing against you. He has way better things to do than stop a young fellow for minor stuff. And he can make more money with big Ticket items. The combination of your lack of plates, and dark tint and you being young in a cool car and maybe the way you were driving drew his attention to you. Learn how not to draw attention.
I find that driving smoothly and with the general flow even if you are going fast is relatively safe from ticketing. The key is to drive with the flow and safely. He is looking for sudden passing of cars, frequent lane changes, unsafe behavior in general etc. I always like to have rabbit, that is a person who is going faster than me or drawing more attention than me. I have driven on long trips at well over the limit as long as the rest of traffic was doing it or I had a rabbit. For example I have driven up interstate 5 in Calif at well over 80mph for hours at a time, because almost everyone is. They stop the guys going 90 or dodging in and out of lanes. Actually now that I think of it, I do this every day on my commute since all the traffic around me is going 80+. I have even done this next to motor cops since they and everyone else were doing it. To not do it could actually cause an accident. He was looking for the lane changers, tail gaters and guys going 95.
Also when you are stopped, a lot of what happens next is based upon your attitude. If your are factual, respectful and reasonably polite, you probably would get a warning. If you are rude of come off with a po'd attitude, you will probaly get to spend some money. And like one officer told me, if a rude person keeps on talking, the officer can keep on writing. Officers go thru hundreds of stops and they can tell BS when they smell it so no BS from you is the smart thing.
Good Luck, over time you will learn how to blend in, let some other younger fellow get the attention,
Jim henderson