Our train system is actually quite nice, though nothing compared to the best rail systems out there in Japan, China, or France (Europe, in general). However, it's certainly more comfortable and cleaner than those of India. In recent times, there have been plenty of issues plaguing the train systems, particularly in NY/NJ/CT. But like all systems, I'm convinced that this one just needs better maintenance, stricter guidelines, and timely communication to ensure order.
I took for granted our train networks here in the United States, but I've come to appreciate them more after having ridden many others around the world. If you need some help getting started, take a peek at the man in Seat61. He's my go-to when I'm looking for a crash course in train travel in a particular locale.
For those of you who haven't had the experience, Amtrak and the localized train networks are waiting for you to embark on your next journey. ALL ABOARD!