I have to go along with the distant train for my favorite sounds. In the mountain area is even better if the whistle sound echoes up through a valley. I heard a man say one time this sound "would bring a tear to a glass eye".
Lease favorite: Loud music regardless of type. Keep your sounds on your own site please or if you want to blast your ears apart, wear a headset. Music sound is right up there with the guy who has to leave a campground way early in the morning and has to "warm up" his diesel for 15-20 minutes before it will move.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof