OK, tuner4life hit it on the head.....it's your car, do what you want to it.
However....let me also throw a little food for thought your way. It's not that Honda's are a bad car. Most Hondas are just little hi gas mileage 4 cylinders whom kids pick up used and throw a fart can, er...muffler or catback on and think then they have the shiznit. Then they buy "JDM" stickers, or other random stickers and plaster them all over the car, then they buy bleacher seats (really high metal trunklid spoilers), and cut the springs and slam them , and put on rims worth more than the car, etc. etc. Do you see where I'm going? And here is the part that jumps out at you.....People do this not only with Hondas, but with any brand automobile. These people and their cars are commonly referred to as ricers! I like to say it simply...all show and no go OR tasteless show and no go.
So, if you want to place stickers on your car, that's fine. Put them where you like, that's fine too. Heck, I had an AEM sticker under my hood and an ARK sticker at the top of my rear windshield. So it is possible to place stickers with taste. That's the key point I'm trying to make....make it tasteful.
Now, you mentioned JDM. Well, if you want to keep a car as you called it "JDM", then you must sell the tiburon and buy yourself a Honda, Nissan, Toyota, Subaru, etc....because I have yet to see a legitimate JDM made part for a Hyundai. They are parts made specifically for certain cars and aren't cheap. Think of JDM as the messiah to Honda parts as Garrett or HKS is to the turbocharger.
If you're friends all drive a Honda and you have a Hyundai, you are going to be the black sheep but that doesn't mean you have to be the slowest sheep....Mod your car quietly, tastefully, and smartly, and the Honda guys/gals won't know what hit them. Then the crooked H earns you a little respect amongst your Honda buddies.
Just my 2 cents, take it for what you will.
And if you also end up in competition events and indeed get yourself a sponsorship, then by all means advertise your sponsors and/or favorite parts....tastefully!