MPBN - Maine Public Radio for southern Maine transmits south, far into New Hampshire and even the north shore of Massachusetts. Primary station characteristics include opera almost all day on the weekends and classical music during the week days. I used to always catch the funny, strange show The Vinyl Cafe that seems to play Gordon Lightfoot music while the host narrates weird stories sent in my listeners in some version of poetry voice. I also like the show Snap Judgement hosted by Glynn Washington which I've only ever heard on this station.
NHPR - New Hampshire Public Radio does not have the strongest signal where I live now, but has some funny quirks that I appreciate. I love the guy who reads the NH news and station underwriting throughout the day. (A quick search has revealed that this is Dan Colgan and he is the "Voice of New Hampshire.") I also love the segment Something Wild that tells me about things like squirrel survival strategies and moose license plates. One annoying/hilarious thing about this station is that, since it transmits to every single town in the state, the list of stations takes about 5 minutes to read off.
UPDATE: I like NHPR even more because of the transition music they play between segments and under local news/weather updates. This morning at 8:30am it was Nelly's "It's Getting Hot in Here."
WBUR - When the NHPR disappears while driving east (which it quickly does), and MPBN is playing opera again, you can tune into WBUR out of Boston, MA. This station is frankly like another planet to me. They air many local show that I am not familiar with, such as, Only A Game, and others that don't even sound like NPR shows! This can be disconcerting. However, there have been many times while diving south on 95 that I have been able to hear This American Life on WBUR, in its entirety.
In conclusion, I still love the NPR station from my hometown most of all (WUNC).