Guys, I know sound is totally "subjective" so let me try and explain this in words.
For me there is a difference between throaty/aggressive and just plain annoying loud - definitely DO NOT want the latter.
Let me give some examples - if any of you are familiar with the factory e46 m3 sound - it is tinny, sounds like a high pitched chain saw and I HATE that sound.
Compare this to my IS-F (V8) with the JoeZ which is a throaty rumble sound that is both deep and also racy at the same time.
There's a few local NSX's here that are just plain annoying in sound. (nothing against the owners if this is what they like) but I hate that sound and I'm pretty sure they are running TP's.
hope this helps you guys distinguish the sound I'm looking for.