I like most kinds of music, folk and otherwise. My tastes in folk covers a wide variety of styles..from Frankie Armstrong to Show of Hands...I don't know if they could be called "source" singers, but I do like the Watersons, Frank Profit , Hedy West and so on.
The kind I don't like are the overly preachy ones..Phil Ochs comes to mind. I also listen to a lot of instrumental folk, Nigel Eaton, Martin Simpson, Katherine Tickell.
I have never understood the desire to pigeon hole music or the insistence that we can only enjoy it if we listen intently. It seems to me that the things music should do is entertain us, fill us with Joy, make us want to sing along, make us want to dance...
It is a joyful thing but some seem to want to turn it into a cultural weapon....I say just embrace it and have fun.