Tzer,

It depends on your age. The older you get the more annoying it sounds.

As an aside, I think this is a fad that has mostly run it's course. Most people I hear commenting on these now express some disdain. Words like "pretender", "fake", etc creep into the conversation, unless the car is an obvious "race" car. Personally, if you really love the sound, do it, it's your car.