I prefer e-skip as it is high-intensity, and you're constantly tuning around and writing down anything that will help you ID the station, and everything is at least several hundred miles away. You get stations at "impossible" distances to the average person. E-skip rarely lasts long enough for you to sample a distant station, and signals always seem to fade when they're saying the legal ID.
Tropo is good too, as it could bring in stations from hundreds of miles away for days at a time. You could sample another area's radio stations for a long time, and if you're driving a long distance, you don't have to change the station as often because the coverage area expands. But tropo hurts the low power stations more. A low power station 100 miles from a 50kw station will frequently get interference during the summer, and nothing can be done about the interference as the 50kw station isn't violating any rules.
Tropo is good too, as it could bring in stations from hundreds of miles away for days at a time. You could sample another area's radio stations for a long time, and if you're driving a long distance, you don't have to change the station as often because the coverage area expands. But tropo hurts the low power stations more. A low power station 100 miles from a 50kw station will frequently get interference during the summer, and nothing can be done about the interference as the 50kw station isn't violating any rules.