The F-14 Tomcat!
I was on a destroyer, (USS Somers, DDG 34) we were following the USS Constellation (aircraft carrier) around the Indian Ocean, and I never got tired of watching them. Thankfully, we often had the job of "plane guard", which was following fairly close in case of a plane going in the water. Coincidentally, it also was the only time I ever stood watch with an M-14. They always had a gunners mate on the rescue team in case of sharks.
A close second would be the A-4 Skyhawk. We had one of those do a close fly-by, it was pretty impressive!