I know it's not as big a thing as it was in the mid-late 2000's but there are still thousands of Shoutcast/Icecast/etc. stations and many of them are programmed by DJs, music enthusiasts, and fans. A good set of bookmarks is like having a radio dial filled with 10 or 20 college radio stations (or whatever analogue you would consider to be the ideal type of radio for your tastes.)
I've been listening to streaming radio since the early 2000's and one of the main reasons I bought my first smartphone (Palm Treo!) was because I could install a Winamp clone and listen in the car, on headphones, or wherever I was. I still do this today--albeit on a slightly nicer phone.