I seriously doubt ANYONE buys a car and says "yup this car is perfect in every way, i couldnt think of ANYTHING i would change"
Theres always little niggly things that can be improved to make the car how you want it (such as short shift, lowering springs to sharpen it up a bit etc). If you end up getting bodykits, roll cages, new or stripped out interiors etc then chances are, youve bought the wrong car. . .
Subtle "enhancements" FTW
Worst thing you can do is go over the top chasing amazing handling & big power, before you know it the car is nothing like the car you bought (seems similar to the OP's experience).