The village where I grew up in Scotland is on a headland on the coast and was near a couple of RAF bases - it seemed a popular route point so my childhood had a lot of very low flying military aircraft about so I guess we were all used to the noise.
Then came the day when there was a Vulcan bomber doing apparently doing aerobatics at a fairly low level over the village - it's probably close to 40 years but I don't think I will ever forget that utterly glorious sound....
[Edit: the sight of a Vulcan being thrown around the sky isn't something I'll forget either!]
At an airshow, I saw a US Harrier do a vertical take off. It was really loud! At a different airshow, I saw an SR-71 take off and fly around. That was pretty damn loud, too. It set off every car alarm in the parking lot.
The painted false cockpit was first operationally used on Canadian CF-18 Hornets, but derived from USAF research in conjunction with an aviation artist.
False cockpit aside, the A-10 is my favorite plane of all time. It has a sound that's really unmistakable.
(well, technically I guess it's the GAU-8 making the sound...)